Built 2026-10-16 (16 October 2026)

Lake Mills Wwtp Weather Records (USC00474482)

Record envelope, standing records and threshold days for Lake Mills Wwtp (USC00474482), Wisconsin, United States, with 134 years of record.

Key Facts for Lake Mills Wwtp

  • Lake Mills Wwtp (USC00474482) is a weather station in Wisconsin, United States at 43.08 latitude and -88.90 longitude, 247 m (811 ft) above sea level.
  • The station reports from 1893 to 2026, 134 years of record.
  • 1,464 records set at Lake Mills Wwtp still stand.
  • Records are tracked for tmax, tmin, prcp, snow, snwd: an element needs 30 years of data to be eligible.
  • Lake Mills Wwtp tied a daily record high maximum temperature of 28.9 C (84.0 F) on 11 October 2026 (provisional).

Provisional Records

Records set in the last 60 days are provisional until they clear the revision window.

About the Station

  • Location: Wisconsin, United States, 43.08 latitude, -88.90 longitude.
  • Elevation: 247 m (811 ft).
  • Period of record: 1893 to 2026, 134 years.
  • Eligible elements: tmax, tmin, prcp, snow, snwd.

Daily Record Envelope and 2026

5 days at or beyond a record
Daily record high and record low at Lake Mills Wwtp, with 2026 drawn through them The band shows the record high and record low for each calendar day at Lake Mills Wwtp. The lines show the 2026 daily maximum and minimum. 5 days in 2026 matched or passed a record. Temperatures are in degrees Celsius. -40-200204060 JanFebMarAprMayJunJulAugSepOctNovDec
The band shows the record high and record low for each calendar day at Lake Mills Wwtp. The lines show the 2026 daily maximum and minimum. 5 days in 2026 matched or passed a record. Temperatures are in degrees Celsius.
Daily record high and record low at Lake Mills Wwtp, with 2026 drawn through them
MonthHighest record highLowest record low2026 highest maximum2026 lowest minimum
Jan15.6 C (60.1 F)-36.1 C (-33.0 F)13.3 C (55.9 F)-27.2 C (-17.0 F)
Feb21.7 C (71.1 F)-35.6 C (-32.1 F)17.2 C (63.0 F)-19.4 C (-2.9 F)
Mar28.9 C (84.0 F)-27.8 C (-18.0 F)26.1 C (79.0 F)-13.9 C (7.0 F)
Apr31.7 C (89.1 F)-13.3 C (8.1 F)27.2 C (81.0 F)-6.7 C (19.9 F)
May39.4 C (102.9 F)-6.7 C (19.9 F)32.2 C (90.0 F)-1.1 C (30.0 F)
Jun40.0 C (104.0 F)-1.7 C (28.9 F)33.9 C (93.0 F)7.2 C (45.0 F)
Jul43.3 C (109.9 F)4.4 C (39.9 F)36.1 C (97.0 F)10.0 C (50.0 F)
Aug40.0 C (104.0 F)1.1 C (34.0 F)30.0 C (86.0 F)10.0 C (50.0 F)
Sep37.8 C (100.0 F)-4.4 C (24.1 F)31.7 C (89.1 F)6.1 C (43.0 F)
Oct32.2 C (90.0 F)-19.4 C (-2.9 F)28.9 C (84.0 F)4.4 C (39.9 F)
Nov25.0 C (77.0 F)-25.0 C (-13.0 F)n/an/a
Dec18.9 C (66.0 F)-31.1 C (-24.0 F)n/an/a

Which Years Hold Standing Records

1,464 standing records
Standing records at Lake Mills Wwtp by the year they were set 1,464 records at Lake Mills Wwtp still stand. 1936 holds the most, with 36. 0102030401893: 171894: 251895: 241896: 191897: 181898: 91899: 191900: 101901: 201902: 91903: 41904: 101905: 71906: 71907: 101908: 31909: 181910: 131911: 151912: 121913: 131914: 41915: 191916: 161917: 211918: 171919: 101920: 161921: 221922: 91923: 131924: 101925: 301926: 81927: 131928: 111929: 161930: 251931: 131932: 121933: 131934: 251935: 71936: 361937: 51938: 71939: 151940: 111941: 61942: 131943: 151944: 71945: 91946: 81947: 141948: 51949: 71950: 91951: 141952: 31953: 151954: 61955: 41956: 31957: 51958: 11959: 131960: 71961: 31962: 61963: 121964: 101965: 101966: 51967: 61968: 81969: 61970: 61971: 51972: 131973: 61974: 111975: 61976: 91977: 111978: 71979: 141980: 51981: 71982: 131983: 161984: 81985: 61986: 101987: 101988: 161989: 71990: 141991: 91992: 111993: 31994: 91995: 31997: 11998: 101999: 42000: 62001: 92002: 162003: 42004: 72005: 52006: 132007: 162008: 92009: 82010: 102011: 112012: 272013: 52014: 132015: 122016: 92017: 192018: 122019: 132020: 142021: 112022: 92023: 112024: 132025: 62026: 101893190719211935194919631977199120062020
1,464 records at Lake Mills Wwtp still stand. 1936 holds the most, with 36.
Standing records at Lake Mills Wwtp by the year they were set
Year setStanding records
189317
189425
189524
189619
189718
18989
189919
190010
190120
19029
19034
190410
19057
19067
190710
19083
190918
191013
191115
191212
191313
19144
191519
191616
191721
191817
191910
192016
192122
19229
192313
192410
192530
19268
192713
192811
192916
193025
193113
193212
193313
193425
19357
193636
19375
19387
193915
194011
19416
194213
194315
19447
19459
19468
194714
19485
19497
19509
195114
19523
195315
19546
19554
19563
19575
19581
195913
19607
19613
19626
196312
196410
196510
19665
19676
19688
19696
19706
19715
197213
19736
197411
19756
19769
197711
19787
197914
19805
19817
198213
198316
19848
19856
198610
198710
198816
19897
199014
19919
199211
19933
19949
19953
19971
199810
19994
20006
20019
200216
20034
20047
20055
200613
200716
20089
20098
201010
201111
201227
20135
201413
201512
20169
201719
201812
201913
202014
202111
20229
202311
202413
20256
202610

All-Time Record Progression

8 new records
When Lake Mills Wwtp set new all-time records 8 all-time records were set at Lake Mills Wwtp between 20 February 1929 and 19 August 2007. Each dot is a new record. Record low minimum temperatureRecord high maximum temperatureRecord daily precipitationRecord daily snowfallRecord snow depth20 February 1929: Record low minimum temperature -35.6 C (-32.1 F)13 July 1936: Record high maximum temperature 42.2 C (108.0 F)14 July 1936: Record high maximum temperature 43.3 C (109.9 F)8 September 1941: Record daily precipitation 129.8 mm (5.1 in)30 January 1947: Record daily snowfall 40.6 cm (16.0 in)30 January 1951: Record low minimum temperature -36.1 C (-33.0 F)24 January 1979: Record snow depth 88.9 cm (35.0 in)19 August 2007: Record daily precipitation 142.0 mm (5.6 in)19301940195019601970198019902000
8 all-time records were set at Lake Mills Wwtp between 20 February 1929 and 19 August 2007. Each dot is a new record.
When Lake Mills Wwtp set new all-time records
DateKindDetail
1929-02-20Record low minimum temperatureRecord low minimum temperature -35.6 C (-32.1 F)
1936-07-13Record high maximum temperatureRecord high maximum temperature 42.2 C (108.0 F)
1936-07-14Record high maximum temperatureRecord high maximum temperature 43.3 C (109.9 F)
1941-09-08Record daily precipitationRecord daily precipitation 129.8 mm (5.1 in)
1947-01-30Record daily snowfallRecord daily snowfall 40.6 cm (16.0 in)
1951-01-30Record low minimum temperatureRecord low minimum temperature -36.1 C (-33.0 F)
1979-01-24Record snow depthRecord snow depth 88.9 cm (35.0 in)
2007-08-19Record daily precipitationRecord daily precipitation 142.0 mm (5.6 in)

Wettest Day of Each Month

Aug: 142.0 mm (5.6 in)
Record daily precipitation for each month at Lake Mills Wwtp The wettest day on record for each calendar month at Lake Mills Wwtp. The most was 142.0 mm (5.6 in) on 19 August 2007. 050100150 Jan: 120.1 mm (4.7 in), 23 January 1996 Jan Feb: 42.2 mm (1.7 in), 22 February 1981 Feb Mar: 63.0 mm (2.5 in), 15 March 1959 Mar Apr: 78.7 mm (3.1 in), 23 April 1999 Apr May: 81.3 mm (3.2 in), 17 May 1999 May Jun: 101.6 mm (4.0 in), 16 June 1996 Jun Jul: 112.3 mm (4.4 in), 17 July 1903 Jul Aug: 142.0 mm (5.6 in), 19 August 2007 Aug Sep: 129.8 mm (5.1 in), 8 September 1941 Sep Oct: 79.5 mm (3.1 in), 17 October 1905 Oct Nov: 76.2 mm (3.0 in), 5 November 2003 Nov Dec: 84.6 mm (3.3 in), 8 December 1995 Dec
The wettest day on record for each calendar month at Lake Mills Wwtp. The most was 142.0 mm (5.6 in) on 19 August 2007.
Record daily precipitation for each month at Lake Mills Wwtp
MonthRecord daily precipitation (mm)Date
Jan120.1 mm (4.7 in)23 January 1996
Feb42.2 mm (1.7 in)22 February 1981
Mar63.0 mm (2.5 in)15 March 1959
Apr78.7 mm (3.1 in)23 April 1999
May81.3 mm (3.2 in)17 May 1999
Jun101.6 mm (4.0 in)16 June 1996
Jul112.3 mm (4.4 in)17 July 1903
Aug142.0 mm (5.6 in)19 August 2007
Sep129.8 mm (5.1 in)8 September 1941
Oct79.5 mm (3.1 in)17 October 1905
Nov76.2 mm (3.0 in)5 November 2003
Dec84.6 mm (3.3 in)8 December 1995

Period of Record Coverage

1893 to 2026
Days with data per year at Lake Mills Wwtp 133 years of record at Lake Mills Wwtp, 1893 to 2026. 14 years have data for under 90 percent of days and are left out of rankings: 1896, 1902, 1903, 1914, 1915, 1920, 1975, 1995 and others. 1893: 344 of 365 days1894: 354 of 365 days1895: 354 of 365 days1896: 294 of 366 days1897: 347 of 365 days1898: 351 of 365 days1899: 350 of 365 days1900: 351 of 365 days1901: 332 of 365 days1902: 325 of 365 days1903: 297 of 365 days1904: 338 of 366 days1905: 348 of 365 days1906: 356 of 365 days1907: 348 of 365 days1908: 358 of 366 days1909: 349 of 365 days1910: 353 of 365 days1911: 364 of 365 days1912: 365 of 366 days1913: 361 of 365 days1914: 236 of 365 days1915: 295 of 365 days1916: 332 of 366 days1917: 362 of 365 days1918: 364 of 365 days1919: 364 of 365 days1920: 326 of 366 days1921: 364 of 365 days1922: 361 of 365 days1923: 364 of 365 days1924: 364 of 366 days1925: 363 of 365 days1926: 365 of 365 days1927: 363 of 365 days1928: 365 of 366 days1929: 362 of 365 days1930: 357 of 365 days1931: 360 of 365 days1932: 355 of 366 days1933: 358 of 365 days1934: 353 of 365 days1935: 361 of 365 days1936: 363 of 366 days1937: 365 of 365 days1938: 360 of 365 days1939: 364 of 365 days1940: 364 of 366 days1941: 363 of 365 days1942: 365 of 365 days1943: 362 of 365 days1944: 365 of 366 days1945: 365 of 365 days1946: 364 of 365 days1947: 365 of 365 days1948: 364 of 366 days1949: 365 of 365 days1950: 364 of 365 days1951: 364 of 365 days1952: 366 of 366 days1953: 365 of 365 days1954: 365 of 365 days1955: 365 of 365 days1956: 366 of 366 days1957: 365 of 365 days1958: 364 of 365 days1959: 362 of 365 days1960: 364 of 366 days1961: 364 of 365 days1962: 363 of 365 days1963: 362 of 365 days1964: 366 of 366 days1965: 360 of 365 days1966: 361 of 365 days1967: 360 of 365 days1968: 355 of 366 days1969: 356 of 365 days1970: 357 of 365 days1971: 363 of 365 days1972: 366 of 366 days1973: 361 of 365 days1974: 356 of 365 days1975: 273 of 365 days1976: 366 of 366 days1977: 365 of 365 days1978: 363 of 365 days1979: 365 of 365 days1980: 366 of 366 days1981: 365 of 365 days1982: 361 of 365 days1983: 363 of 365 days1984: 364 of 366 days1985: 362 of 365 days1986: 361 of 365 days1987: 362 of 365 days1988: 366 of 366 days1989: 363 of 365 days1990: 364 of 365 days1991: 364 of 365 days1992: 365 of 366 days1993: 364 of 365 days1994: 363 of 365 days1995: 151 of 365 days1997: 345 of 365 days1998: 346 of 365 days1999: 331 of 365 days2000: 264 of 366 days2001: 314 of 365 days2002: 263 of 365 days2003: 288 of 365 days2004: 312 of 366 days2005: 362 of 365 days2006: 362 of 365 days2007: 360 of 365 days2008: 361 of 366 days2009: 359 of 365 days2010: 364 of 365 days2011: 364 of 365 days2012: 366 of 366 days2013: 364 of 365 days2014: 365 of 365 days2015: 365 of 365 days2016: 362 of 366 days2017: 363 of 365 days2018: 360 of 365 days2019: 362 of 365 days2020: 365 of 366 days2021: 362 of 365 days2022: 364 of 365 days2023: 363 of 365 days2024: 365 of 366 days2025: 365 of 365 days2026: 279 of 365 days1900192019401960198020002020
133 years of record at Lake Mills Wwtp, 1893 to 2026. 14 years have data for under 90 percent of days and are left out of rankings: 1896, 1902, 1903, 1914, 1915, 1920, 1975, 1995 and others.
Days with data per year at Lake Mills Wwtp
YearDays with dataShare of yearComplete
189334494%Yes
189435497%Yes
189535497%Yes
189629480%No
189734795%Yes
189835196%Yes
189935096%Yes
190035196%Yes
190133291%Yes
190232589%No
190329781%No
190433892%Yes
190534895%Yes
190635698%Yes
190734895%Yes
190835898%Yes
190934996%Yes
191035397%Yes
1911364100%Yes
1912365100%Yes
191336199%Yes
191423665%No
191529581%No
191633291%Yes
191736299%Yes
1918364100%Yes
1919364100%Yes
192032689%No
1921364100%Yes
192236199%Yes
1923364100%Yes
192436499%Yes
192536399%Yes
1926365100%Yes
192736399%Yes
1928365100%Yes
192936299%Yes
193035798%Yes
193136099%Yes
193235597%Yes
193335898%Yes
193435397%Yes
193536199%Yes
193636399%Yes
1937365100%Yes
193836099%Yes
1939364100%Yes
194036499%Yes
194136399%Yes
1942365100%Yes
194336299%Yes
1944365100%Yes
1945365100%Yes
1946364100%Yes
1947365100%Yes
194836499%Yes
1949365100%Yes
1950364100%Yes
1951364100%Yes
1952366100%Yes
1953365100%Yes
1954365100%Yes
1955365100%Yes
1956366100%Yes
1957365100%Yes
1958364100%Yes
195936299%Yes
196036499%Yes
1961364100%Yes
196236399%Yes
196336299%Yes
1964366100%Yes
196536099%Yes
196636199%Yes
196736099%Yes
196835597%Yes
196935698%Yes
197035798%Yes
197136399%Yes
1972366100%Yes
197336199%Yes
197435698%Yes
197527375%No
1976366100%Yes
1977365100%Yes
197836399%Yes
1979365100%Yes
1980366100%Yes
1981365100%Yes
198236199%Yes
198336399%Yes
198436499%Yes
198536299%Yes
198636199%Yes
198736299%Yes
1988366100%Yes
198936399%Yes
1990364100%Yes
1991364100%Yes
1992365100%Yes
1993364100%Yes
199436399%Yes
199515141%No
199734595%Yes
199834695%Yes
199933191%Yes
200026472%No
200131486%No
200226372%No
200328879%No
200431285%No
200536299%Yes
200636299%Yes
200736099%Yes
200836199%Yes
200935998%Yes
2010364100%Yes
2011364100%Yes
2012366100%Yes
2013364100%Yes
2014365100%Yes
2015365100%Yes
201636299%Yes
201736399%Yes
201836099%Yes
201936299%Yes
2020365100%Yes
202136299%Yes
2022364100%Yes
202336399%Yes
2024365100%Yes
2025365100%Yes
202627976%No

Latest Records

20
Latest records at Lake Mills Wwtp
DateStationRecordValueBeat old record byOld record stoodSignificance
11 October 2026Lake Mills Wwtp, USdaily high max (Tie, Provisional)28.9 C (84.0 F)tie16 years3 of 100 (Routine)
1 August 2026Lake Mills Wwtp, USdaily rain86.6 mm (3.4 in)46.0 mm (1.8 in)116 years71 of 100 (Major)
1 July 2026Lake Mills Wwtp, USdaily high min25.6 C (78.1 F)1.7 C (3.1 F)95 years42 of 100 (Notable)
30 June 2026Lake Mills Wwtp, USmonthly high min (Tie)26.1 C (79.0 F)tie83 years11 of 100 (Routine)
15 April 2026Lake Mills Wwtp, USdaily high min (Tie)14.4 C (57.9 F)tie72 years7 of 100 (Routine)
13 April 2026Lake Mills Wwtp, USdaily high min14.4 C (57.9 F)1.1 C (2.0 F)84 years37 of 100 (Notable)
18 March 2026Lake Mills Wwtp, USdaily low max-4.4 C (24.1 F)0.5 C (0.9 F)112 years40 of 100 (Notable)
16 March 2026Lake Mills Wwtp, USdaily snowfall16.5 cm (6.5 in)8.9 cm (3.5 in)103 years57 of 100 (Notable)
16 March 2026Lake Mills Wwtp, USdaily rain34.0 mm (1.3 in)2.8 mm (0.11 in)107 years43 of 100 (Notable)
10 March 2026Lake Mills Wwtp, USdaily high max21.7 C (71.1 F)2.8 C (5.0 F)131 years44 of 100 (Notable)
17 February 2026Lake Mills Wwtp, USdaily high max17.2 C (63.0 F)3.3 C (5.9 F)44 years28 of 100 (Routine)
24 January 2026Lake Mills Wwtp, USdaily low max-22.2 C (-8.0 F)3.9 C (7.0 F)90 years43 of 100 (Notable)
14 January 2026Lake Mills Wwtp, USdaily high max11.1 C (52.0 F)1.1 C (2.0 F)98 years40 of 100 (Notable)
9 January 2026Lake Mills Wwtp, USdaily high min2.2 C (36.0 F)1.6 C (2.9 F)102 years42 of 100 (Notable)
9 January 2026Lake Mills Wwtp, USdaily high max13.3 C (55.9 F)1.6 C (2.9 F)87 years38 of 100 (Notable)
14 December 2025Lake Mills Wwtp, USdaily low max-15.0 C (5.0 F)0.6 C (1.1 F)122 years41 of 100 (Notable)
5 December 2025Lake Mills Wwtp, USdaily low max-8.3 C (17.1 F)1.1 C (2.0 F)129 years41 of 100 (Notable)
30 November 2025Lake Mills Wwtp, USdaily snowfall24.1 cm (9.5 in)11.4 cm (4.5 in)84 years63 of 100 (Major)
6 October 2025Lake Mills Wwtp, USdaily high min (Tie)16.1 C (61.0 F)tie86 years8 of 100 (Routine)
5 October 2025Lake Mills Wwtp, USdaily high max (Tie)31.1 C (88.0 F)tie20 years4 of 100 (Routine)

Climate Trend

112 complete years, 1893 to 2025
Annual mean temperature at Lake Mills Wwtp as warming stripes, 1893 to 2025 One stripe for each of 112 complete years at Lake Mills Wwtp, 1893 to 2025. Blue stripes are years cooler than the station's own mean of 8.4 C (47.1 F); red stripes are warmer. The coolest year was 1917, at 5.7 C (42.2 F), and the warmest was 2012, at 10.6 C (51.1 F). The strongest colour marks a difference of 2.7 C (4.9 F). 1893: 6.2 C, -2.2 C from the station mean1894: 8.3 C, -0.1 C from the station mean1895: 7.1 C, -1.3 C from the station mean1897: 8.1 C, -0.3 C from the station mean1898: 8.0 C, -0.4 C from the station mean1899: 7.7 C, -0.7 C from the station mean1900: 8.7 C, +0.3 C from the station mean1906: 8.2 C, -0.2 C from the station mean1907: 7.0 C, -1.3 C from the station mean1908: 8.3 C, -0.1 C from the station mean1909: 7.4 C, -1.0 C from the station mean1910: 7.8 C, -0.6 C from the station mean1911: 8.9 C, +0.5 C from the station mean1912: 6.7 C, -1.7 C from the station mean1913: 8.4 C, 0.0 C from the station mean1917: 5.7 C, -2.7 C from the station mean1919: 8.5 C, +0.1 C from the station mean1921: 10.1 C, +1.8 C from the station mean1922: 7.7 C, -0.7 C from the station mean1923: 8.1 C, -0.3 C from the station mean1924: 6.5 C, -1.9 C from the station mean1925: 7.1 C, -1.3 C from the station mean1926: 7.1 C, -1.3 C from the station mean1927: 8.6 C, +0.2 C from the station mean1928: 8.9 C, +0.5 C from the station mean1929: 7.1 C, -1.3 C from the station mean1930: 8.9 C, +0.5 C from the station mean1931: 10.5 C, +2.1 C from the station mean1932: 8.2 C, -0.2 C from the station mean1933: 9.0 C, +0.6 C from the station mean1934: 9.0 C, +0.6 C from the station mean1935: 8.2 C, -0.2 C from the station mean1936: 7.9 C, -0.5 C from the station mean1937: 7.9 C, -0.5 C from the station mean1938: 9.2 C, +0.9 C from the station mean1939: 9.6 C, +1.2 C from the station mean1940: 7.6 C, -0.7 C from the station mean1941: 9.5 C, +1.1 C from the station mean1942: 8.4 C, +0.1 C from the station mean1943: 7.9 C, -0.5 C from the station mean1944: 8.8 C, +0.4 C from the station mean1945: 7.6 C, -0.8 C from the station mean1946: 9.1 C, +0.7 C from the station mean1947: 7.7 C, -0.7 C from the station mean1948: 8.2 C, -0.2 C from the station mean1949: 8.6 C, +0.2 C from the station mean1950: 6.9 C, -1.5 C from the station mean1951: 7.3 C, -1.1 C from the station mean1952: 9.2 C, +0.8 C from the station mean1953: 9.9 C, +1.5 C from the station mean1954: 9.4 C, +1.0 C from the station mean1955: 9.1 C, +0.7 C from the station mean1956: 9.0 C, +0.6 C from the station mean1957: 8.6 C, +0.2 C from the station mean1958: 8.1 C, -0.3 C from the station mean1959: 7.9 C, -0.4 C from the station mean1960: 8.2 C, -0.2 C from the station mean1961: 8.8 C, +0.4 C from the station mean1962: 8.0 C, -0.3 C from the station mean1963: 8.0 C, -0.4 C from the station mean1964: 9.2 C, +0.8 C from the station mean1965: 8.2 C, -0.2 C from the station mean1966: 7.9 C, -0.4 C from the station mean1967: 7.9 C, -0.5 C from the station mean1968: 9.1 C, +0.7 C from the station mean1969: 7.9 C, -0.5 C from the station mean1970: 8.0 C, -0.4 C from the station mean1971: 8.5 C, +0.1 C from the station mean1972: 7.2 C, -1.2 C from the station mean1973: 9.3 C, +1.0 C from the station mean1974: 7.8 C, -0.5 C from the station mean1976: 8.0 C, -0.4 C from the station mean1978: 7.0 C, -1.4 C from the station mean1979: 7.1 C, -1.2 C from the station mean1980: 7.6 C, -0.8 C from the station mean1981: 8.8 C, +0.4 C from the station mean1982: 7.8 C, -0.6 C from the station mean1983: 8.6 C, +0.2 C from the station mean1984: 8.8 C, +0.4 C from the station mean1985: 7.8 C, -0.6 C from the station mean1986: 8.7 C, +0.3 C from the station mean1987: 10.1 C, +1.7 C from the station mean1988: 9.1 C, +0.7 C from the station mean1989: 7.7 C, -0.7 C from the station mean1990: 9.6 C, +1.2 C from the station mean1991: 9.2 C, +0.9 C from the station mean1992: 8.9 C, +0.5 C from the station mean1993: 8.7 C, +0.3 C from the station mean1994: 9.0 C, +0.6 C from the station mean1997: 8.2 C, -0.2 C from the station mean2001: 9.3 C, +0.9 C from the station mean2005: 9.0 C, +0.6 C from the station mean2006: 9.3 C, +0.9 C from the station mean2007: 8.8 C, +0.4 C from the station mean2008: 7.4 C, -1.0 C from the station mean2009: 7.8 C, -0.6 C from the station mean2010: 9.2 C, +0.8 C from the station mean2011: 8.7 C, +0.3 C from the station mean2012: 10.6 C, +2.2 C from the station mean2013: 7.4 C, -1.0 C from the station mean2014: 6.5 C, -1.9 C from the station mean2015: 8.9 C, +0.5 C from the station mean2016: 9.8 C, +1.4 C from the station mean2017: 9.3 C, +1.0 C from the station mean2018: 8.4 C, 0.0 C from the station mean2019: 8.0 C, -0.4 C from the station mean2020: 9.3 C, +0.9 C from the station mean2021: 9.7 C, +1.3 C from the station mean2022: 8.2 C, -0.2 C from the station mean2023: 10.0 C, +1.6 C from the station mean2024: 10.3 C, +1.9 C from the station mean2025: 8.9 C, +0.5 C from the station mean18931900191019201930194019501960197019801990200020102020
One stripe for each of 112 complete years at Lake Mills Wwtp, 1893 to 2025. Blue stripes are years cooler than the station's own mean of 8.4 C (47.1 F); red stripes are warmer. The coolest year was 1917, at 5.7 C (42.2 F), and the warmest was 2012, at 10.6 C (51.1 F). The strongest colour marks a difference of 2.7 C (4.9 F).
Annual mean temperature at Lake Mills Wwtp as warming stripes, 1893 to 2025
YearAnnual mean temperatureDifference from the station mean
18936.2 C-2.18 C
18948.3 C-0.05 C
18957.1 C-1.30 C
18978.1 C-0.28 C
18988.0 C-0.36 C
18997.7 C-0.65 C
19008.7 C+0.28 C
19068.2 C-0.18 C
19077.0 C-1.34 C
19088.3 C-0.08 C
19097.4 C-0.97 C
19107.8 C-0.62 C
19118.9 C+0.51 C
19126.7 C-1.65 C
19138.4 C-0.01 C
19175.7 C-2.68 C
19198.5 C+0.14 C
192110.1 C+1.76 C
19227.7 C-0.67 C
19238.1 C-0.32 C
19246.5 C-1.89 C
19257.1 C-1.28 C
19267.1 C-1.28 C
19278.6 C+0.21 C
19288.9 C+0.49 C
19297.1 C-1.32 C
19308.9 C+0.53 C
193110.5 C+2.15 C
19328.2 C-0.17 C
19339.0 C+0.64 C
19349.0 C+0.58 C
19358.2 C-0.16 C
19367.9 C-0.47 C
19377.9 C-0.48 C
19389.2 C+0.86 C
19399.6 C+1.18 C
19407.6 C-0.73 C
19419.5 C+1.13 C
19428.4 C+0.06 C
19437.9 C-0.48 C
19448.8 C+0.41 C
19457.6 C-0.75 C
19469.1 C+0.75 C
19477.7 C-0.67 C
19488.2 C-0.22 C
19498.6 C+0.19 C
19506.9 C-1.52 C
19517.3 C-1.11 C
19529.2 C+0.81 C
19539.9 C+1.52 C
19549.4 C+1.00 C
19559.1 C+0.75 C
19569.0 C+0.65 C
19578.6 C+0.20 C
19588.1 C-0.27 C
19597.9 C-0.44 C
19608.2 C-0.21 C
19618.8 C+0.38 C
19628.0 C-0.33 C
19638.0 C-0.37 C
19649.2 C+0.82 C
19658.2 C-0.18 C
19667.9 C-0.43 C
19677.9 C-0.45 C
19689.1 C+0.70 C
19697.9 C-0.51 C
19708.0 C-0.37 C
19718.5 C+0.10 C
19727.2 C-1.17 C
19739.3 C+0.96 C
19747.8 C-0.53 C
19768.0 C-0.37 C
19787.0 C-1.38 C
19797.1 C-1.23 C
19807.6 C-0.81 C
19818.8 C+0.38 C
19827.8 C-0.57 C
19838.6 C+0.23 C
19848.8 C+0.40 C
19857.8 C-0.57 C
19868.7 C+0.28 C
198710.1 C+1.69 C
19889.1 C+0.71 C
19897.7 C-0.72 C
19909.6 C+1.20 C
19919.2 C+0.87 C
19928.9 C+0.51 C
19938.7 C+0.31 C
19949.0 C+0.62 C
19978.2 C-0.22 C
20019.3 C+0.94 C
20059.0 C+0.64 C
20069.3 C+0.92 C
20078.8 C+0.44 C
20087.4 C-0.98 C
20097.8 C-0.60 C
20109.2 C+0.80 C
20118.7 C+0.28 C
201210.6 C+2.22 C
20137.4 C-0.99 C
20146.5 C-1.85 C
20158.9 C+0.52 C
20169.8 C+1.43 C
20179.3 C+0.96 C
20188.4 C-0.02 C
20198.0 C-0.40 C
20209.3 C+0.90 C
20219.7 C+1.28 C
20228.2 C-0.19 C
202310.0 C+1.58 C
202410.3 C+1.93 C
20258.9 C+0.49 C

The annual mean temperature here has risen by 0.09 C (0.04 to 0.13) per decade over 1893 to 2025. In Fahrenheit: 0.2 F (0.1 to 0.2) per decade. The slope is a straight line fitted to 112 complete years; the brackets give its 95 percent interval.

Fitted temperature trends per decade at Lake Mills Wwtp
MeasurePer decade (C)Per decade (F)PeriodComplete yearsReading
Annual mean temperature0.09 C (0.04 to 0.13) per decade0.2 F (0.1 to 0.2) per decade1893 to 2025112Rise
Mean daily maximum0.06 C (0.01 to 0.10) per decade0.10 F (0.02 to 0.19) per decade1893 to 2025112Rise
Mean daily minimum0.1 C (0.1 to 0.2) per decade0.2 F (0.1 to 0.3) per decade1893 to 2025112Rise

A year is complete when all 12 months have at least 20 days of both daily maximum and daily minimum readings. The annual mean is the mean of the monthly means. The trend describes this one station over this period; it does not say what caused the change.

Extremes by Year

1893 to 2026
Yearly extremes at Lake Mills Wwtp: the record and the median year
MeasureRecordYear of the recordMedian yearYears with a value
Hottest day (TXx)43.3 C (109.9 F)193635.6 C (96.1 F)133
Coldest night (TNn)-36.1 C (-33.0 F)1951-26.7 C (-16.1 F)133
Wettest day (Rx1day)142.0 mm (5.6 in)200757.3 mm (2.3 in)134
Wettest five days (Rx5day)207.3 mm (8.2 in)200788.8 mm (3.5 in)134
Longest dry spell (CDD)45 days196121 days134

Hottest day (TXx)

Hottest day (TXx) at Lake Mills Wwtp by year The hottest day of the year at Lake Mills Wwtp, 1893 to 2026. The record is 43.3 C (109.9 F) in 1936, marked on the chart; the median year is 35.6 C (96.1 F). 25303540451900192019401960198020002020Record: 43.3 C (109.9 F) in 1936
The hottest day of the year at Lake Mills Wwtp, 1893 to 2026. The record is 43.3 C (109.9 F) in 1936, marked on the chart; the median year is 35.6 C (96.1 F).
Hottest day (TXx) at Lake Mills Wwtp by year
YearHottest day (TXx)
189336.1 C (97.0 F)
189437.2 C (99.0 F)
189536.7 C (98.1 F)
189635.6 C (96.1 F)
189736.1 C (97.0 F)
189834.4 C (93.9 F)
189935.0 C (95.0 F)
190035.6 C (96.1 F)
190141.7 C (107.1 F)
190232.2 C (90.0 F)
190332.2 C (90.0 F)
190436.1 C (97.0 F)
190533.9 C (93.0 F)
190633.3 C (91.9 F)
190733.9 C (93.0 F)
190836.1 C (97.0 F)
190937.2 C (99.0 F)
191037.2 C (99.0 F)
191141.1 C (106.0 F)
191235.6 C (96.1 F)
191336.7 C (98.1 F)
191436.1 C (97.0 F)
191530.6 C (87.1 F)
191638.9 C (102.0 F)
191735.6 C (96.1 F)
191837.2 C (99.0 F)
191937.2 C (99.0 F)
192033.9 C (93.0 F)
192137.2 C (99.0 F)
192236.1 C (97.0 F)
192336.7 C (98.1 F)
192432.2 C (90.0 F)
192536.1 C (97.0 F)
192636.1 C (97.0 F)
192736.7 C (98.1 F)
192833.9 C (93.0 F)
192933.3 C (91.9 F)
193036.7 C (98.1 F)
193137.2 C (99.0 F)
193235.0 C (95.0 F)
193337.2 C (99.0 F)
193440.0 C (104.0 F)
193536.1 C (97.0 F)
193643.3 C (109.9 F)
193737.8 C (100.0 F)
193833.9 C (93.0 F)
193937.8 C (100.0 F)
194036.7 C (98.1 F)
194137.8 C (100.0 F)
194235.0 C (95.0 F)
194335.0 C (95.0 F)
194435.6 C (96.1 F)
194535.6 C (96.1 F)
194635.6 C (96.1 F)
194737.2 C (99.0 F)
194835.6 C (96.1 F)
194935.6 C (96.1 F)
195031.7 C (89.1 F)
195132.8 C (91.0 F)
195233.9 C (93.0 F)
195337.8 C (100.0 F)
195434.4 C (93.9 F)
195536.1 C (97.0 F)
195635.0 C (95.0 F)
195733.3 C (91.9 F)
195833.3 C (91.9 F)
195932.8 C (91.0 F)
196032.2 C (90.0 F)
196132.2 C (90.0 F)
196233.3 C (91.9 F)
196333.3 C (91.9 F)
196433.9 C (93.0 F)
196534.4 C (93.9 F)
196633.9 C (93.0 F)
196731.1 C (88.0 F)
196835.6 C (96.1 F)
196933.9 C (93.0 F)
197035.6 C (96.1 F)
197135.0 C (95.0 F)
197235.0 C (95.0 F)
197336.1 C (97.0 F)
197435.0 C (95.0 F)
197535.6 C (96.1 F)
197637.2 C (99.0 F)
197736.7 C (98.1 F)
197836.7 C (98.1 F)
197932.2 C (90.0 F)
198035.0 C (95.0 F)
198133.9 C (93.0 F)
198233.9 C (93.0 F)
198336.7 C (98.1 F)
198436.7 C (98.1 F)
198535.0 C (95.0 F)
198635.0 C (95.0 F)
198737.2 C (99.0 F)
198840.0 C (104.0 F)
198935.6 C (96.1 F)
199034.4 C (93.9 F)
199135.6 C (96.1 F)
199235.0 C (95.0 F)
199333.3 C (91.9 F)
199436.7 C (98.1 F)
199528.9 C (84.0 F)
1996n/a
199735.0 C (95.0 F)
199834.4 C (93.9 F)
199937.2 C (99.0 F)
200033.9 C (93.0 F)
200136.7 C (98.1 F)
200236.1 C (97.0 F)
200335.0 C (95.0 F)
200431.7 C (89.1 F)
200535.6 C (96.1 F)
200636.1 C (97.0 F)
200733.9 C (93.0 F)
200833.9 C (93.0 F)
200935.6 C (96.1 F)
201034.4 C (93.9 F)
201136.7 C (98.1 F)
201240.0 C (104.0 F)
201335.6 C (96.1 F)
201432.8 C (91.0 F)
201533.9 C (93.0 F)
201633.9 C (93.0 F)
201734.4 C (93.9 F)
201835.0 C (95.0 F)
201934.4 C (93.9 F)
202034.4 C (93.9 F)
202135.0 C (95.0 F)
202236.7 C (98.1 F)
202337.8 C (100.0 F)
202434.4 C (93.9 F)
202535.0 C (95.0 F)
202636.1 C (97.0 F)

Coldest night (TNn)

Coldest night (TNn) at Lake Mills Wwtp by year The coldest night of the year at Lake Mills Wwtp, 1893 to 2026. The record is -36.1 C (-33.0 F) in 1951, marked on the chart; the median year is -26.7 C (-16.1 F). -40-35-30-25-20-151900192019401960198020002020Record: -36.1 C (-33.0 F) in 1951
The coldest night of the year at Lake Mills Wwtp, 1893 to 2026. The record is -36.1 C (-33.0 F) in 1951, marked on the chart; the median year is -26.7 C (-16.1 F).
Coldest night (TNn) at Lake Mills Wwtp by year
YearColdest night (TNn)
1893-30.6 C (-23.1 F)
1894-29.4 C (-20.9 F)
1895-30.6 C (-23.1 F)
1896-25.0 C (-13.0 F)
1897-29.4 C (-20.9 F)
1898-23.9 C (-11.0 F)
1899-31.1 C (-24.0 F)
1900-24.4 C (-11.9 F)
1901-27.8 C (-18.0 F)
1902-26.7 C (-16.1 F)
1903-28.3 C (-18.9 F)
1904-32.8 C (-27.0 F)
1905-30.6 C (-23.1 F)
1906-23.9 C (-11.0 F)
1907-25.0 C (-13.0 F)
1908-23.9 C (-11.0 F)
1909-29.4 C (-20.9 F)
1910-30.0 C (-22.0 F)
1911-23.9 C (-11.0 F)
1912-31.7 C (-25.1 F)
1913-25.0 C (-13.0 F)
1914-26.1 C (-15.0 F)
1915-18.9 C (-2.0 F)
1916-28.3 C (-18.9 F)
1917-28.3 C (-18.9 F)
1918-30.0 C (-22.0 F)
1919-28.9 C (-20.0 F)
1920-27.2 C (-17.0 F)
1921-21.7 C (-7.1 F)
1922-27.8 C (-18.0 F)
1923-27.2 C (-17.0 F)
1924-31.1 C (-24.0 F)
1925-26.7 C (-16.1 F)
1926-30.0 C (-22.0 F)
1927-28.9 C (-20.0 F)
1928-23.9 C (-11.0 F)
1929-35.6 C (-32.1 F)
1930-31.7 C (-25.1 F)
1931-23.9 C (-11.0 F)
1932-26.1 C (-15.0 F)
1933-31.1 C (-24.0 F)
1934-25.0 C (-13.0 F)
1935-30.0 C (-22.0 F)
1936-32.8 C (-27.0 F)
1937-22.2 C (-8.0 F)
1938-23.9 C (-11.0 F)
1939-20.6 C (-5.1 F)
1940-32.8 C (-27.0 F)
1941-24.4 C (-11.9 F)
1942-31.7 C (-25.1 F)
1943-27.8 C (-18.0 F)
1944-25.6 C (-14.1 F)
1945-27.2 C (-17.0 F)
1946-26.1 C (-15.0 F)
1947-27.8 C (-18.0 F)
1948-28.9 C (-20.0 F)
1949-28.9 C (-20.0 F)
1950-27.2 C (-17.0 F)
1951-36.1 C (-33.0 F)
1952-25.6 C (-14.1 F)
1953-22.2 C (-8.0 F)
1954-26.1 C (-15.0 F)
1955-25.6 C (-14.1 F)
1956-24.4 C (-11.9 F)
1957-24.4 C (-11.9 F)
1958-25.6 C (-14.1 F)
1959-35.0 C (-31.0 F)
1960-25.6 C (-14.1 F)
1961-23.9 C (-11.0 F)
1962-28.9 C (-20.0 F)
1963-32.8 C (-27.0 F)
1964-21.1 C (-6.0 F)
1965-30.0 C (-22.0 F)
1966-30.6 C (-23.1 F)
1967-28.3 C (-18.9 F)
1968-26.7 C (-16.1 F)
1969-26.1 C (-15.0 F)
1970-31.7 C (-25.1 F)
1971-28.9 C (-20.0 F)
1972-31.1 C (-24.0 F)
1973-24.4 C (-11.9 F)
1974-28.9 C (-20.0 F)
1975-27.8 C (-18.0 F)
1976-27.8 C (-18.0 F)
1977-31.1 C (-24.0 F)
1978-26.7 C (-16.1 F)
1979-31.7 C (-25.1 F)
1980-24.4 C (-11.9 F)
1981-24.4 C (-11.9 F)
1982-33.3 C (-27.9 F)
1983-31.1 C (-24.0 F)
1984-30.6 C (-23.1 F)
1985-33.9 C (-29.0 F)
1986-28.3 C (-18.9 F)
1987-23.9 C (-11.0 F)
1988-27.2 C (-17.0 F)
1989-28.9 C (-20.0 F)
1990-25.0 C (-13.0 F)
1991-26.7 C (-16.1 F)
1992-22.8 C (-9.0 F)
1993-24.4 C (-11.9 F)
1994-33.9 C (-29.0 F)
1995-23.9 C (-11.0 F)
1996n/a
1997-25.6 C (-14.1 F)
1998-21.7 C (-7.1 F)
1999-28.9 C (-20.0 F)
2000-27.8 C (-18.0 F)
2001-19.4 C (-2.9 F)
2002-22.2 C (-8.0 F)
2003-22.2 C (-8.0 F)
2004-24.4 C (-11.9 F)
2005-22.8 C (-9.0 F)
2006-27.2 C (-17.0 F)
2007-26.7 C (-16.1 F)
2008-24.4 C (-11.9 F)
2009-30.6 C (-23.1 F)
2010-22.2 C (-8.0 F)
2011-26.7 C (-16.1 F)
2012-20.6 C (-5.1 F)
2013-24.4 C (-11.9 F)
2014-28.3 C (-18.9 F)
2015-24.4 C (-11.9 F)
2016-25.6 C (-14.1 F)
2017-22.2 C (-8.0 F)
2018-24.4 C (-11.9 F)
2019-33.9 C (-29.0 F)
2020-23.3 C (-9.9 F)
2021-25.0 C (-13.0 F)
2022-27.2 C (-17.0 F)
2023-25.6 C (-14.1 F)
2024-23.9 C (-11.0 F)
2025-23.9 C (-11.0 F)
2026-27.2 C (-17.0 F)

Wettest day (Rx1day)

Wettest day (Rx1day) at Lake Mills Wwtp by year The wettest day of the year at Lake Mills Wwtp, 1893 to 2026. The record is 142.0 mm (5.6 in) in 2007, marked on the chart; the median year is 57.3 mm (2.3 in). 0501001501900192019401960198020002020Record: 142.0 mm (5.6 in) in 2007
The wettest day of the year at Lake Mills Wwtp, 1893 to 2026. The record is 142.0 mm (5.6 in) in 2007, marked on the chart; the median year is 57.3 mm (2.3 in).
Wettest day (Rx1day) at Lake Mills Wwtp by year
YearWettest day (Rx1day)
189358.4 mm (2.3 in)
189485.9 mm (3.4 in)
189551.6 mm (2.0 in)
189654.9 mm (2.2 in)
189750.3 mm (2.0 in)
189878.7 mm (3.1 in)
189953.8 mm (2.1 in)
190049.8 mm (2.0 in)
190127.7 mm (1.1 in)
190252.3 mm (2.1 in)
1903112.3 mm (4.4 in)
190455.1 mm (2.2 in)
190579.5 mm (3.1 in)
190645.2 mm (1.8 in)
190753.8 mm (2.1 in)
190833.5 mm (1.3 in)
190970.1 mm (2.8 in)
191043.7 mm (1.7 in)
191151.6 mm (2.0 in)
1912100.6 mm (4.0 in)
191363.0 mm (2.5 in)
191437.1 mm (1.5 in)
191558.4 mm (2.3 in)
191663.0 mm (2.5 in)
191781.8 mm (3.2 in)
191847.8 mm (1.9 in)
191944.7 mm (1.8 in)
192054.1 mm (2.1 in)
192188.1 mm (3.5 in)
192280.8 mm (3.2 in)
192346.5 mm (1.8 in)
1924103.6 mm (4.1 in)
192558.4 mm (2.3 in)
192635.6 mm (1.4 in)
192755.9 mm (2.2 in)
192849.5 mm (1.9 in)
192953.1 mm (2.1 in)
193063.0 mm (2.5 in)
193188.9 mm (3.5 in)
193238.1 mm (1.5 in)
193363.5 mm (2.5 in)
193440.6 mm (1.6 in)
193542.2 mm (1.7 in)
193658.4 mm (2.3 in)
193766.3 mm (2.6 in)
193890.7 mm (3.6 in)
193937.1 mm (1.5 in)
194052.1 mm (2.1 in)
1941129.8 mm (5.1 in)
194254.4 mm (2.1 in)
194355.4 mm (2.2 in)
194442.9 mm (1.7 in)
194536.8 mm (1.4 in)
194628.7 mm (1.1 in)
194772.4 mm (2.9 in)
194838.1 mm (1.5 in)
194967.8 mm (2.7 in)
195098.3 mm (3.9 in)
195141.1 mm (1.6 in)
195261.5 mm (2.4 in)
195343.2 mm (1.7 in)
195447.8 mm (1.9 in)
195575.2 mm (3.0 in)
195649.5 mm (1.9 in)
195750.5 mm (2.0 in)
195855.9 mm (2.2 in)
195963.0 mm (2.5 in)
196069.3 mm (2.7 in)
196185.3 mm (3.4 in)
196258.2 mm (2.3 in)
196365.5 mm (2.6 in)
196436.1 mm (1.4 in)
196558.4 mm (2.3 in)
196657.2 mm (2.3 in)
196740.1 mm (1.6 in)
196843.9 mm (1.7 in)
196965.3 mm (2.6 in)
197037.8 mm (1.5 in)
197141.9 mm (1.6 in)
197264.3 mm (2.5 in)
197362.2 mm (2.4 in)
197443.7 mm (1.7 in)
197539.9 mm (1.6 in)
197638.6 mm (1.5 in)
197762.5 mm (2.5 in)
197877.0 mm (3.0 in)
197929.5 mm (1.2 in)
198069.1 mm (2.7 in)
198152.6 mm (2.1 in)
198258.9 mm (2.3 in)
198327.9 mm (1.1 in)
198478.5 mm (3.1 in)
198556.1 mm (2.2 in)
198684.1 mm (3.3 in)
198748.3 mm (1.9 in)
198838.6 mm (1.5 in)
198982.8 mm (3.3 in)
1990125.2 mm (4.9 in)
199154.1 mm (2.1 in)
199259.7 mm (2.4 in)
199348.8 mm (1.9 in)
199450.8 mm (2.0 in)
199584.6 mm (3.3 in)
1996120.1 mm (4.7 in)
199757.4 mm (2.3 in)
199861.0 mm (2.4 in)
199981.3 mm (3.2 in)
200061.0 mm (2.4 in)
200155.9 mm (2.2 in)
200243.2 mm (1.7 in)
200376.2 mm (3.0 in)
200471.1 mm (2.8 in)
200545.5 mm (1.8 in)
200691.2 mm (3.6 in)
2007142.0 mm (5.6 in)
200873.7 mm (2.9 in)
200961.2 mm (2.4 in)
201093.5 mm (3.7 in)
201152.6 mm (2.1 in)
201240.4 mm (1.6 in)
201356.6 mm (2.2 in)
201451.6 mm (2.0 in)
201581.5 mm (3.2 in)
201652.1 mm (2.1 in)
201757.4 mm (2.3 in)
201886.4 mm (3.4 in)
201962.0 mm (2.4 in)
202097.3 mm (3.8 in)
202163.0 mm (2.5 in)
2022118.9 mm (4.7 in)
202355.4 mm (2.2 in)
202470.4 mm (2.8 in)
202542.4 mm (1.7 in)
202686.6 mm (3.4 in)

Wettest five days (Rx5day)

Wettest five days (Rx5day) at Lake Mills Wwtp by year The wettest five days of the year at Lake Mills Wwtp, 1893 to 2026. The record is 207.3 mm (8.2 in) in 2007, marked on the chart; the median year is 88.8 mm (3.5 in). 0501001502002501900192019401960198020002020Record: 207.3 mm (8.2 in) in 2007
The wettest five days of the year at Lake Mills Wwtp, 1893 to 2026. The record is 207.3 mm (8.2 in) in 2007, marked on the chart; the median year is 88.8 mm (3.5 in).
Wettest five days (Rx5day) at Lake Mills Wwtp by year
YearWettest five days (Rx5day)
189362.5 mm (2.5 in)
1894144.1 mm (5.7 in)
189567.5 mm (2.7 in)
189674.7 mm (2.9 in)
189782.4 mm (3.2 in)
189889.9 mm (3.5 in)
189974.1 mm (2.9 in)
190080.0 mm (3.1 in)
190165.5 mm (2.6 in)
1902118.4 mm (4.7 in)
1903114.1 mm (4.5 in)
190490.2 mm (3.6 in)
1905106.9 mm (4.2 in)
190689.0 mm (3.5 in)
190781.2 mm (3.2 in)
190872.2 mm (2.8 in)
190990.1 mm (3.5 in)
191077.7 mm (3.1 in)
191184.9 mm (3.3 in)
191296.5 mm (3.8 in)
1913113.9 mm (4.5 in)
191471.8 mm (2.8 in)
1915154.0 mm (6.1 in)
191685.6 mm (3.4 in)
1917106.9 mm (4.2 in)
191868.6 mm (2.7 in)
1919102.6 mm (4.0 in)
192096.2 mm (3.8 in)
192197.8 mm (3.9 in)
1922115.3 mm (4.5 in)
192378.7 mm (3.1 in)
1924160.3 mm (6.3 in)
192567.3 mm (2.6 in)
192655.1 mm (2.2 in)
192794.8 mm (3.7 in)
192872.6 mm (2.9 in)
192969.9 mm (2.8 in)
193082.4 mm (3.2 in)
193193.5 mm (3.7 in)
193254.6 mm (2.1 in)
1933107.2 mm (4.2 in)
193486.4 mm (3.4 in)
193561.3 mm (2.4 in)
193699.3 mm (3.9 in)
193778.7 mm (3.1 in)
1938116.9 mm (4.6 in)
193948.3 mm (1.9 in)
194085.9 mm (3.4 in)
1941172.7 mm (6.8 in)
194270.3 mm (2.8 in)
194360.4 mm (2.4 in)
194473.9 mm (2.9 in)
194550.8 mm (2.0 in)
194648.2 mm (1.9 in)
194779.3 mm (3.1 in)
194872.4 mm (2.9 in)
194971.1 mm (2.8 in)
1950182.4 mm (7.2 in)
1951108.9 mm (4.3 in)
195297.6 mm (3.8 in)
195381.8 mm (3.2 in)
1954108.3 mm (4.3 in)
1955126.6 mm (5.0 in)
195690.2 mm (3.6 in)
195756.9 mm (2.2 in)
195880.5 mm (3.2 in)
195980.3 mm (3.2 in)
196093.9 mm (3.7 in)
1961145.0 mm (5.7 in)
196258.2 mm (2.3 in)
196365.5 mm (2.6 in)
196450.2 mm (2.0 in)
1965114.6 mm (4.5 in)
196659.0 mm (2.3 in)
1967144.6 mm (5.7 in)
1968111.7 mm (4.4 in)
196997.1 mm (3.8 in)
197067.8 mm (2.7 in)
197154.8 mm (2.2 in)
1972100.1 mm (3.9 in)
197396.7 mm (3.8 in)
197458.9 mm (2.3 in)
197556.5 mm (2.2 in)
197674.8 mm (2.9 in)
1977118.4 mm (4.7 in)
1978104.1 mm (4.1 in)
197950.8 mm (2.0 in)
1980146.9 mm (5.8 in)
198187.3 mm (3.4 in)
198284.6 mm (3.3 in)
198358.4 mm (2.3 in)
1984101.6 mm (4.0 in)
198578.0 mm (3.1 in)
1986100.0 mm (3.9 in)
198770.1 mm (2.8 in)
198882.8 mm (3.3 in)
198992.5 mm (3.6 in)
1990171.4 mm (6.7 in)
1991128.3 mm (5.1 in)
199285.1 mm (3.4 in)
199369.9 mm (2.8 in)
199483.5 mm (3.3 in)
1995158.1 mm (6.2 in)
1996151.9 mm (6.0 in)
199788.6 mm (3.5 in)
1998148.6 mm (5.9 in)
1999104.9 mm (4.1 in)
2000129.6 mm (5.1 in)
200176.2 mm (3.0 in)
200299.0 mm (3.9 in)
2003111.8 mm (4.4 in)
2004114.3 mm (4.5 in)
200558.9 mm (2.3 in)
2006131.9 mm (5.2 in)
2007207.3 mm (8.2 in)
2008191.1 mm (7.5 in)
200973.7 mm (2.9 in)
2010119.4 mm (4.7 in)
201168.1 mm (2.7 in)
201271.9 mm (2.8 in)
2013111.7 mm (4.4 in)
2014109.2 mm (4.3 in)
2015103.8 mm (4.1 in)
201661.0 mm (2.4 in)
201765.3 mm (2.6 in)
2018163.4 mm (6.4 in)
201999.0 mm (3.9 in)
2020117.4 mm (4.6 in)
202193.0 mm (3.7 in)
2022154.2 mm (6.1 in)
202368.1 mm (2.7 in)
2024102.3 mm (4.0 in)
202574.1 mm (2.9 in)
2026101.6 mm (4.0 in)

Longest dry spell (CDD)

Longest dry spell (CDD) at Lake Mills Wwtp by year The longest dry spell of the year at Lake Mills Wwtp, 1893 to 2026. The record is 45 days in 1961, marked on the chart; the median year is 21 days. 10203040501900192019401960198020002020Record: 45 days in 1961
The longest dry spell of the year at Lake Mills Wwtp, 1893 to 2026. The record is 45 days in 1961, marked on the chart; the median year is 21 days.
Longest dry spell (CDD) at Lake Mills Wwtp by year
YearLongest dry spell (CDD)
189335 days
189415 days
189518 days
189615 days
189719 days
189813 days
189929 days
190015 days
190124 days
190232 days
190312 days
190421 days
190522 days
190618 days
190721 days
190820 days
190935 days
191033 days
191127 days
191217 days
191325 days
191415 days
191530 days
191624 days
191723 days
191822 days
191940 days
192017 days
192114 days
192227 days
192320 days
192418 days
192529 days
192620 days
192719 days
192827 days
192918 days
193029 days
193118 days
193222 days
193326 days
193420 days
193516 days
193624 days
193726 days
193817 days
193929 days
194020 days
194116 days
194228 days
194325 days
194427 days
194516 days
194618 days
194719 days
194819 days
194923 days
195030 days
195114 days
195230 days
195324 days
195419 days
195519 days
195639 days
195723 days
195835 days
195927 days
196023 days
196145 days
196216 days
196316 days
196424 days
196519 days
196620 days
196724 days
196823 days
196925 days
197020 days
197123 days
197217 days
197314 days
197414 days
197517 days
197626 days
197718 days
197825 days
197927 days
198018 days
198117 days
198219 days
198315 days
198421 days
198514 days
198620 days
198729 days
198843 days
198924 days
199014 days
199128 days
199212 days
199322 days
199415 days
199522 days
199617 days
199715 days
199820 days
199925 days
200029 days
200139 days
200221 days
200320 days
200419 days
200515 days
200618 days
200726 days
200818 days
200926 days
201029 days
201116 days
201226 days
201314 days
201415 days
201527 days
201619 days
201715 days
201820 days
201919 days
202020 days
202123 days
202223 days
202322 days
202422 days
202532 days
202629 days

Each chart shows one value per year; the dot marks the record year. TXx is the hottest daily maximum, TNn the coldest daily minimum, Rx1day and Rx5day the largest one-day and five-day rain totals, and CDD the longest run of days with less than 1 mm of rain. A year with missing days can understate an extreme.

Frost Dates and Growing Season

112 years with a frost

Across 112 years with a frost, the median last spring frost at Lake Mills Wwtp falls on 5 May and the median first autumn frost on 9 October, which leaves a median of 160 days between them.

In 1988 to 2025 the median growing season was 170 days. That is 23 days more than in 1893 to 1933.

Fitted over all years, the growing season changes by +2.2 days per decade at this station.

Frost dates and growing season at Lake Mills Wwtp
MeasureMedian, all yearsEarliest period (1893 to 1933)Recent period (1988 to 2025)Recent against earliestFitted trend
Last spring frost5 May10 May28 April12 days earlier-1.4 days per decade
First autumn frost9 October8 October14 October6 days later+0.8 days per decade
Growing days160 days147 days170 days23 days more+2.2 days per decade

A frost day is a day with a daily minimum at or below 0 C (32 F). The last spring frost and the first autumn frost are the last and first such days of the cold season, and growing days are the days between them. A negative trend for the last spring frost means it comes earlier.

Rainfall Return Levels

107 years, 1898 to 2025

A day with at least 58.1 mm (2.3 in) of rain is expected about once in 2 years. A day with at least 141.1 mm (5.6 in) of rain is expected about once in 100 years.

Rainfall return levels at Lake Mills Wwtp: the daily rain expected about once in a given number of years
Expected about once inA day with at leastNote
2 years58.1 mm (2.3 in)
5 years77.9 mm (3.1 in)
10 years91.9 mm (3.6 in)
25 years110.8 mm (4.4 in)
50 years125.6 mm (4.9 in)
100 years141.1 mm (5.6 in)

The levels come from a generalised extreme value (GEV) distribution fitted by L-moments to the wettest-day total of each year, 107 years of values from 1898 to 2025.

A return level is an estimate. It is least reliable for the long periods, 50 and 100 years, and for any period longer than the record behind the fit, where the fit has to reach past the largest day actually observed. It is not a forecast.

The largest wettest-day totals in the fit: 142.0 mm (5.6 in) in 2007; 129.8 mm (5.1 in) in 1941; 125.2 mm (4.9 in) in 1990.

Station Changes

No change in the annual mean temperature of this station was found against its neighbours.

Climate Twins

2011 to 2025 against 1961 to 1990

Over 2011 to 2025, Lake Mills Wwtp had a mean temperature of 8.9 C (48.0 F) and 927.2 mm (36.5 in) of rain a year. The 3 stations whose 1961 to 1990 climate was closest to that are Park Forest Water (United States, 203 km away), Wheatfield (United States, 259 km away) and Angola (United States, 355 km away).

Climate twins of Lake Mills Wwtp: stations whose 1961 to 1990 climate is closest to its 2011 to 2025 climate
Twin stationCountryDistance awayMean temperature, 1961-1990Rain a year, 1961-1990Climate difference
Park Forest WaterUnited States203 km (126 mi)9.3 C (48.8 F)918.3 mm (36.2 in)0.79
WheatfieldUnited States259 km (161 mi)9.2 C (48.5 F)902.5 mm (35.5 in)0.80
AngolaUnited States355 km (221 mi)8.5 C (47.3 F)905.2 mm (35.6 in)0.81

Twins are stations, not cities. A twin is one of the three stations at least 100 km away whose earlier climate is closest to this station's recent one, so a close match does not mean the two places look alike in other ways. A station move or a gap in a record can change that station's averages. The list describes past climate; it is not a forecast and does not say what caused any change. How twins are found, and a search for any station.

Download the Data

  • Data for Lake Mills Wwtp standing records by year: CSV or JSON. Field meanings are on the data page.
  • Data for Lake Mills Wwtp threshold days by year: CSV or JSON. Field meanings are on the data page.

Source: NOAA National Centers for Environmental Information, Global Historical Climatology Network Daily (GHCN-Daily). Records are computed by World Extreme Weather Monitor and are not official NOAA products. (US Government open data (NOAA NCEI)) Data as of 2026-10-14 (14 October 2026). Records are computed by this site and are not official.

Data as of . Last revised (2026-10-14).