Built 2026-10-14 (14 October 2026)

Dayton Mcd Weather Records (USC00332067)

Record envelope, standing records and threshold days for Dayton Mcd (USC00332067), Ohio, United States, with 134 years of record.

Key Facts for Dayton Mcd

  • Dayton Mcd (USC00332067) is a weather station in Ohio, United States at 39.78 latitude and -84.19 longitude, 227 m (743 ft) above sea level.
  • The station reports from 1893 to 2026, 134 years of record.
  • 1,464 records set at Dayton Mcd still stand.
  • Records are tracked for tmax, tmin, prcp, snow, snwd: an element needs 30 years of data to be eligible.
  • Dayton Mcd set a daily record precipitation of 53.6 mm (2.1 in) on 21 September 2026 (provisional).

Provisional Records

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

About the Station

  • Location: Ohio, United States, 39.78 latitude, -84.19 longitude.
  • Elevation: 227 m (743 ft).
  • Period of record: 1893 to 2026, 134 years.
  • Eligible elements: tmax, tmin, prcp, snow, snwd.

Daily Record Envelope and 2026

0 days at or beyond a record
Daily record high and record low at Dayton Mcd, with 2026 drawn through them The band shows the record high and record low for each calendar day at Dayton Mcd. The lines show the 2026 daily maximum and minimum. 0 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 Dayton Mcd. The lines show the 2026 daily maximum and minimum. 0 days in 2026 matched or passed a record. Temperatures are in degrees Celsius.
Daily record high and record low at Dayton Mcd, with 2026 drawn through them
MonthHighest record highLowest record low2026 highest maximum2026 lowest minimum
Jan23.9 C (75.0 F)-29.4 C (-20.9 F)n/an/a
Feb25.0 C (77.0 F)-33.3 C (-27.9 F)n/an/a
Mar31.1 C (88.0 F)-17.8 C (0.0 F)n/an/a
Apr32.2 C (90.0 F)-9.4 C (15.1 F)n/an/a
May36.7 C (98.1 F)-2.2 C (28.0 F)n/an/a
Jun39.4 C (102.9 F)2.8 C (37.0 F)n/an/a
Jul42.2 C (108.0 F)7.2 C (45.0 F)n/an/a
Aug40.6 C (105.1 F)2.8 C (37.0 F)n/an/a
Sep38.9 C (102.0 F)-1.7 C (28.9 F)n/an/a
Oct36.7 C (98.1 F)-7.8 C (18.0 F)n/an/a
Nov27.2 C (81.0 F)-15.6 C (3.9 F)n/an/a
Dec23.9 C (75.0 F)-26.7 C (-16.1 F)n/an/a

Which Years Hold Standing Records

1,464 standing records
Standing records at Dayton Mcd by the year they were set 1,464 records at Dayton Mcd still stand. 1897 holds the most, with 41. 02040601893: 51894: 141895: 301896: 211897: 411898: 101899: 301900: 181901: 231902: 131903: 181904: 161905: 31906: 201907: 181908: 151909: 171910: 181911: 211912: 121913: 221914: 241915: 221916: 101917: 251918: 171919: 41920: 151921: 51922: 101923: 141933: 31934: 181935: 81936: 181937: 61938: 51939: 21940: 101941: 101942: 111943: 161944: 71945: 111946: 51947: 71948: 61949: 101950: 191951: 111952: 101953: 61954: 111955: 101956: 41957: 81958: 81959: 91960: 101961: 71962: 121963: 101964: 121965: 51966: 101967: 71968: 51969: 41970: 81971: 41972: 111973: 61974: 101975: 41976: 141977: 161978: 31979: 91980: 51981: 51982: 121983: 151984: 171985: 101986: 161987: 61988: 141989: 121990: 161991: 161992: 81993: 61994: 101995: 81996: 91997: 51998: 161999: 152000: 102001: 182002: 42003: 42004: 52005: 82006: 52007: 132008: 92009: 62010: 132011: 182012: 142013: 112014: 212015: 162016: 92017: 172018: 242019: 272020: 282021: 161893190519171938195019621974198619982010
1,464 records at Dayton Mcd still stand. 1897 holds the most, with 41.
Standing records at Dayton Mcd by the year they were set
Year setStanding records
18935
189414
189530
189621
189741
189810
189930
190018
190123
190213
190318
190416
19053
190620
190718
190815
190917
191018
191121
191212
191322
191424
191522
191610
191725
191817
19194
192015
19215
192210
192314
19333
193418
19358
193618
19376
19385
19392
194010
194110
194211
194316
19447
194511
19465
19477
19486
194910
195019
195111
195210
19536
195411
195510
19564
19578
19588
19599
196010
19617
196212
196310
196412
19655
196610
19677
19685
19694
19708
19714
197211
19736
197410
19754
197614
197716
19783
19799
19805
19815
198212
198315
198417
198510
198616
19876
198814
198912
199016
199116
19928
19936
199410
19958
19969
19975
199816
199915
200010
200118
20024
20034
20045
20058
20065
200713
20089
20096
201013
201118
201214
201311
201421
201516
20169
201717
201824
201927
202028
202116

All-Time Record Progression

7 new records
When Dayton Mcd set new all-time records 7 all-time records were set at Dayton Mcd between 29 June 1934 and 31 July 1999. Each dot is a new record. Record high minimum temperatureRecord low maximum temperatureRecord snow depthRecord daily precipitation29 June 1934: Record high minimum temperature 26.7 C (80.1 F)21 July 1934: Record high minimum temperature 27.8 C (82.0 F)17 January 1977: Record low maximum temperature -22.2 C (-8.0 F)21 January 1978: Record snow depth 48.3 cm (19.0 in)27 January 1978: Record snow depth 53.3 cm (21.0 in)14 September 1979: Record daily precipitation 118.1 mm (4.6 in)31 July 1999: Record high minimum temperature 28.3 C (82.9 F)1940195019601970198019902000
7 all-time records were set at Dayton Mcd between 29 June 1934 and 31 July 1999. Each dot is a new record.
When Dayton Mcd set new all-time records
DateKindDetail
1934-06-29Record high minimum temperatureRecord high minimum temperature 26.7 C (80.1 F)
1934-07-21Record high minimum temperatureRecord high minimum temperature 27.8 C (82.0 F)
1977-01-17Record low maximum temperatureRecord low maximum temperature -22.2 C (-8.0 F)
1978-01-21Record snow depthRecord snow depth 48.3 cm (19.0 in)
1978-01-27Record snow depthRecord snow depth 53.3 cm (21.0 in)
1979-09-14Record daily precipitationRecord daily precipitation 118.1 mm (4.6 in)
1999-07-31Record high minimum temperatureRecord high minimum temperature 28.3 C (82.9 F)

Wettest Day of Each Month

Sep: 118.1 mm (4.6 in)
Record daily precipitation for each month at Dayton Mcd The wettest day on record for each calendar month at Dayton Mcd. The most was 118.1 mm (4.6 in) on 14 September 1979. 050100150 Jan: 74.4 mm (2.9 in), 22 January 1959 Jan Feb: 57.9 mm (2.3 in), 2 February 1988 Feb Mar: 83.3 mm (3.3 in), 5 March 1897 Mar Apr: 80.3 mm (3.2 in), 14 April 1922 Apr May: 99.1 mm (3.9 in), 18 May 1991 May Jun: 105.9 mm (4.2 in), 19 June 2021 Jun Jul: 70.4 mm (2.8 in), 22 July 2006 Jul Aug: 109.2 mm (4.3 in), 2 August 2026 Aug Sep: 118.1 mm (4.6 in), 14 September 1979 Sep Oct: 97.0 mm (3.8 in), 5 October 1910 Oct Nov: 79.2 mm (3.1 in), 6 November 1948 Nov Dec: 69.6 mm (2.7 in), 22 December 2013 Dec
The wettest day on record for each calendar month at Dayton Mcd. The most was 118.1 mm (4.6 in) on 14 September 1979.
Record daily precipitation for each month at Dayton Mcd
MonthRecord daily precipitation (mm)Date
Jan74.4 mm (2.9 in)22 January 1959
Feb57.9 mm (2.3 in)2 February 1988
Mar83.3 mm (3.3 in)5 March 1897
Apr80.3 mm (3.2 in)14 April 1922
May99.1 mm (3.9 in)18 May 1991
Jun105.9 mm (4.2 in)19 June 2021
Jul70.4 mm (2.8 in)22 July 2006
Aug109.2 mm (4.3 in)2 August 2026
Sep118.1 mm (4.6 in)14 September 1979
Oct97.0 mm (3.8 in)5 October 1910
Nov79.2 mm (3.1 in)6 November 1948
Dec69.6 mm (2.7 in)22 December 2013

Period of Record Coverage

1893 to 2021
Days with data per year at Dayton Mcd 121 years of record at Dayton Mcd, 1893 to 2021. 9 years have data for under 90 percent of days and are left out of rankings: 1893, 1894, 1895, 1924, 1933, 1985, 2007, 2012 and others. 1893: 214 of 365 days1894: 325 of 365 days1895: 292 of 365 days1896: 366 of 366 days1897: 365 of 365 days1898: 363 of 365 days1899: 359 of 365 days1900: 362 of 365 days1901: 363 of 365 days1902: 362 of 365 days1903: 361 of 365 days1904: 361 of 366 days1905: 365 of 365 days1906: 362 of 365 days1907: 362 of 365 days1908: 363 of 366 days1909: 358 of 365 days1910: 363 of 365 days1911: 356 of 365 days1912: 350 of 366 days1913: 354 of 365 days1914: 357 of 365 days1915: 365 of 365 days1916: 365 of 366 days1917: 365 of 365 days1918: 365 of 365 days1919: 365 of 365 days1920: 364 of 366 days1921: 363 of 365 days1922: 362 of 365 days1923: 364 of 365 days1924: 31 of 366 days1933: 116 of 365 days1934: 346 of 365 days1935: 344 of 365 days1936: 348 of 366 days1937: 346 of 365 days1938: 350 of 365 days1939: 347 of 365 days1940: 348 of 366 days1941: 345 of 365 days1942: 348 of 365 days1943: 363 of 365 days1944: 365 of 366 days1945: 365 of 365 days1946: 365 of 365 days1947: 365 of 365 days1948: 366 of 366 days1949: 360 of 365 days1950: 364 of 365 days1951: 360 of 365 days1952: 365 of 366 days1953: 362 of 365 days1954: 360 of 365 days1955: 358 of 365 days1956: 359 of 366 days1957: 357 of 365 days1958: 361 of 365 days1959: 359 of 365 days1960: 362 of 366 days1961: 361 of 365 days1962: 365 of 365 days1963: 365 of 365 days1964: 366 of 366 days1965: 365 of 365 days1966: 364 of 365 days1967: 365 of 365 days1968: 366 of 366 days1969: 360 of 365 days1970: 336 of 365 days1971: 365 of 365 days1972: 364 of 366 days1973: 337 of 365 days1974: 365 of 365 days1975: 363 of 365 days1976: 366 of 366 days1977: 364 of 365 days1978: 361 of 365 days1979: 363 of 365 days1980: 356 of 366 days1981: 364 of 365 days1982: 364 of 365 days1983: 361 of 365 days1984: 364 of 366 days1985: 324 of 365 days1986: 334 of 365 days1987: 362 of 365 days1988: 361 of 366 days1989: 364 of 365 days1990: 358 of 365 days1991: 356 of 365 days1992: 352 of 366 days1993: 364 of 365 days1994: 364 of 365 days1995: 363 of 365 days1996: 365 of 366 days1997: 361 of 365 days1998: 349 of 365 days1999: 345 of 365 days2000: 350 of 366 days2001: 365 of 365 days2002: 356 of 365 days2003: 364 of 365 days2004: 332 of 366 days2005: 363 of 365 days2006: 361 of 365 days2007: 276 of 365 days2008: 365 of 366 days2009: 365 of 365 days2010: 334 of 365 days2011: 360 of 365 days2012: 305 of 366 days2013: 365 of 365 days2014: 364 of 365 days2015: 336 of 365 days2016: 363 of 366 days2017: 364 of 365 days2018: 365 of 365 days2019: 365 of 365 days2020: 339 of 366 days2021: 212 of 365 days1900192019401960198020002020
121 years of record at Dayton Mcd, 1893 to 2021. 9 years have data for under 90 percent of days and are left out of rankings: 1893, 1894, 1895, 1924, 1933, 1985, 2007, 2012 and others.
Days with data per year at Dayton Mcd
YearDays with dataShare of yearComplete
189321459%No
189432589%No
189529280%No
1896366100%Yes
1897365100%Yes
189836399%Yes
189935998%Yes
190036299%Yes
190136399%Yes
190236299%Yes
190336199%Yes
190436199%Yes
1905365100%Yes
190636299%Yes
190736299%Yes
190836399%Yes
190935898%Yes
191036399%Yes
191135698%Yes
191235096%Yes
191335497%Yes
191435798%Yes
1915365100%Yes
1916365100%Yes
1917365100%Yes
1918365100%Yes
1919365100%Yes
192036499%Yes
192136399%Yes
192236299%Yes
1923364100%Yes
1924318%No
193311632%No
193434695%Yes
193534494%Yes
193634895%Yes
193734695%Yes
193835096%Yes
193934795%Yes
194034895%Yes
194134595%Yes
194234895%Yes
194336399%Yes
1944365100%Yes
1945365100%Yes
1946365100%Yes
1947365100%Yes
1948366100%Yes
194936099%Yes
1950364100%Yes
195136099%Yes
1952365100%Yes
195336299%Yes
195436099%Yes
195535898%Yes
195635998%Yes
195735798%Yes
195836199%Yes
195935998%Yes
196036299%Yes
196136199%Yes
1962365100%Yes
1963365100%Yes
1964366100%Yes
1965365100%Yes
1966364100%Yes
1967365100%Yes
1968366100%Yes
196936099%Yes
197033692%Yes
1971365100%Yes
197236499%Yes
197333792%Yes
1974365100%Yes
197536399%Yes
1976366100%Yes
1977364100%Yes
197836199%Yes
197936399%Yes
198035697%Yes
1981364100%Yes
1982364100%Yes
198336199%Yes
198436499%Yes
198532489%No
198633492%Yes
198736299%Yes
198836199%Yes
1989364100%Yes
199035898%Yes
199135698%Yes
199235296%Yes
1993364100%Yes
1994364100%Yes
199536399%Yes
1996365100%Yes
199736199%Yes
199834996%Yes
199934595%Yes
200035096%Yes
2001365100%Yes
200235698%Yes
2003364100%Yes
200433291%Yes
200536399%Yes
200636199%Yes
200727676%No
2008365100%Yes
2009365100%Yes
201033492%Yes
201136099%Yes
201230583%No
2013365100%Yes
2014364100%Yes
201533692%Yes
201636399%Yes
2017364100%Yes
2018365100%Yes
2019365100%Yes
202033993%Yes
202121258%No

Latest Records

20
Latest records at Dayton Mcd
DateStationRecordValueBeat old record byOld record stoodSignificance
21 September 2026Dayton Mcd, USdaily rain (Provisional)53.6 mm (2.1 in)19.1 mm (0.8 in)79 years48 of 100 (Notable)
13 August 2026Dayton Mcd, USdaily rain50.3 mm (2.0 in)13.7 mm (0.5 in)28 years29 of 100 (Routine)
12 August 2026Dayton Mcd, USdaily rain50.3 mm (2.0 in)11.7 mm (0.5 in)81 years44 of 100 (Notable)
2 August 2026Dayton Mcd, USmonthly rain109.2 mm (4.3 in)25.6 mm (1.0 in)120 years72 of 100 (Major)
23 May 2026Dayton Mcd, USdaily rain82.8 mm (3.3 in)15.5 mm (0.6 in)36 years35 of 100 (Notable)
28 April 2026Dayton Mcd, USdaily rain42.2 mm (1.7 in)6.6 mm (0.26 in)24 years23 of 100 (Routine)
20 February 2026Dayton Mcd, USdaily rain36.8 mm (1.4 in)7.6 mm (0.30 in)7 years21 of 100 (Routine)
8 October 2025Dayton Mcd, USdaily rain36.8 mm (1.4 in)12.4 mm (0.5 in)27 years29 of 100 (Routine)
16 February 2025Dayton Mcd, USdaily rain47.0 mm (1.9 in)15.2 mm (0.6 in)115 years58 of 100 (Notable)
29 December 2024Dayton Mcd, USdaily rain33.5 mm (1.3 in)2.5 mm (0.10 in)109 years43 of 100 (Notable)
28 September 2024Dayton Mcd, USdaily rain57.7 mm (2.3 in)14.8 mm (0.6 in)90 years49 of 100 (Notable)
6 March 2024Dayton Mcd, USdaily rain28.4 mm (1.1 in)0.5 mm (0.02 in)79 years33 of 100 (Routine)
4 March 2023Dayton Mcd, USdaily rain66.3 mm (2.6 in)39.1 mm (1.5 in)14 years52 of 100 (Notable)
25 January 2023Dayton Mcd, USdaily rain16.8 mm (0.7 in)1.6 mm (0.06 in)127 years20 of 100 (Routine)
28 July 2022Dayton Mcd, USdaily rain44.7 mm (1.8 in)2.3 mm (0.09 in)41 years23 of 100 (Routine)
18 July 2022Dayton Mcd, USdaily rain42.4 mm (1.7 in)10.4 mm (0.4 in)100 years48 of 100 (Notable)
7 March 2022Dayton Mcd, USdaily rain58.4 mm (2.3 in)31.0 mm (1.2 in)111 years70 of 100 (Major)
18 February 2022Dayton Mcd, USdaily rain32.0 mm (1.3 in)10.2 mm (0.4 in)46 years35 of 100 (Notable)
23 September 2021Dayton Mcd, USdaily rain30.5 mm (1.2 in)4.8 mm (0.19 in)12 years16 of 100 (Routine)
27 August 2021Dayton Mcd, USdaily rain44.5 mm (1.8 in)5.4 mm (0.21 in)115 years44 of 100 (Notable)

Climate Trend

105 complete years, 1896 to 2019
Annual mean temperature at Dayton Mcd as warming stripes, 1896 to 2019 One stripe for each of 105 complete years at Dayton Mcd, 1896 to 2019. Blue stripes are years cooler than the station's own mean of 12.0 C (53.6 F); red stripes are warmer. The coolest year was 1917, at 9.7 C (49.5 F), and the warmest was 1998, at 14.3 C (57.8 F). The strongest colour marks a difference of 2.4 C (4.3 F). 1896: 12.5 C, +0.5 C from the station mean1897: 12.2 C, +0.2 C from the station mean1898: 12.3 C, +0.4 C from the station mean1899: 12.2 C, +0.2 C from the station mean1900: 12.5 C, +0.5 C from the station mean1901: 11.1 C, -0.9 C from the station mean1902: 11.3 C, -0.7 C from the station mean1903: 11.2 C, -0.8 C from the station mean1904: 10.0 C, -1.9 C from the station mean1905: 11.0 C, -1.0 C from the station mean1906: 11.7 C, -0.3 C from the station mean1907: 10.8 C, -1.1 C from the station mean1908: 12.2 C, +0.2 C from the station mean1909: 11.5 C, -0.5 C from the station mean1910: 11.1 C, -0.9 C from the station mean1911: 12.4 C, +0.5 C from the station mean1912: 10.6 C, -1.4 C from the station mean1913: 12.3 C, +0.4 C from the station mean1914: 11.5 C, -0.4 C from the station mean1915: 11.4 C, -0.6 C from the station mean1916: 11.5 C, -0.5 C from the station mean1917: 9.7 C, -2.3 C from the station mean1918: 11.7 C, -0.3 C from the station mean1919: 12.3 C, +0.3 C from the station mean1920: 11.3 C, -0.7 C from the station mean1921: 13.6 C, +1.6 C from the station mean1922: 12.7 C, +0.7 C from the station mean1923: 11.8 C, -0.2 C from the station mean1934: 11.9 C, -0.1 C from the station mean1935: 11.2 C, -0.8 C from the station mean1936: 11.5 C, -0.5 C from the station mean1937: 11.1 C, -0.9 C from the station mean1938: 12.6 C, +0.6 C from the station mean1939: 12.4 C, +0.4 C from the station mean1940: 10.8 C, -1.2 C from the station mean1941: 12.5 C, +0.5 C from the station mean1942: 11.9 C, -0.1 C from the station mean1943: 11.9 C, -0.1 C from the station mean1944: 12.6 C, +0.6 C from the station mean1945: 11.7 C, -0.3 C from the station mean1946: 13.0 C, +1.0 C from the station mean1947: 11.7 C, -0.3 C from the station mean1948: 12.3 C, +0.3 C from the station mean1949: 13.4 C, +1.4 C from the station mean1950: 11.4 C, -0.5 C from the station mean1951: 11.8 C, -0.2 C from the station mean1952: 12.6 C, +0.6 C from the station mean1953: 13.2 C, +1.2 C from the station mean1954: 13.1 C, +1.1 C from the station mean1955: 12.9 C, +0.9 C from the station mean1956: 12.7 C, +0.8 C from the station mean1957: 12.8 C, +0.8 C from the station mean1958: 11.3 C, -0.7 C from the station mean1959: 13.1 C, +1.1 C from the station mean1960: 12.0 C, 0.0 C from the station mean1961: 12.3 C, +0.3 C from the station mean1962: 12.1 C, +0.1 C from the station mean1963: 11.5 C, -0.5 C from the station mean1964: 13.0 C, +1.0 C from the station mean1965: 12.9 C, +0.9 C from the station mean1966: 11.7 C, -0.3 C from the station mean1967: 11.4 C, -0.6 C from the station mean1968: 11.8 C, -0.2 C from the station mean1969: 11.5 C, -0.5 C from the station mean1971: 12.2 C, +0.3 C from the station mean1972: 11.3 C, -0.6 C from the station mean1974: 11.9 C, -0.1 C from the station mean1975: 12.4 C, +0.4 C from the station mean1976: 11.2 C, -0.8 C from the station mean1977: 11.7 C, -0.3 C from the station mean1978: 10.6 C, -1.4 C from the station mean1979: 10.9 C, -1.1 C from the station mean1980: 11.3 C, -0.7 C from the station mean1981: 11.4 C, -0.6 C from the station mean1982: 11.7 C, -0.2 C from the station mean1983: 11.9 C, -0.1 C from the station mean1984: 11.6 C, -0.4 C from the station mean1986: 12.5 C, +0.5 C from the station mean1987: 13.1 C, +1.1 C from the station mean1988: 12.0 C, 0.0 C from the station mean1989: 11.2 C, -0.7 C from the station mean1990: 13.1 C, +1.1 C from the station mean1991: 13.3 C, +1.3 C from the station mean1992: 11.7 C, -0.3 C from the station mean1993: 11.8 C, -0.2 C from the station mean1994: 12.2 C, +0.2 C from the station mean1995: 11.8 C, -0.2 C from the station mean1996: 11.4 C, -0.6 C from the station mean1997: 11.4 C, -0.6 C from the station mean1998: 14.3 C, +2.3 C from the station mean2000: 12.5 C, +0.5 C from the station mean2001: 13.2 C, +1.2 C from the station mean2002: 12.9 C, +0.9 C from the station mean2003: 11.5 C, -0.5 C from the station mean2005: 12.4 C, +0.4 C from the station mean2006: 13.0 C, +1.0 C from the station mean2008: 11.8 C, -0.2 C from the station mean2009: 11.8 C, -0.2 C from the station mean2011: 13.0 C, +1.0 C from the station mean2013: 11.5 C, -0.5 C from the station mean2014: 10.5 C, -1.5 C from the station mean2016: 12.8 C, +0.8 C from the station mean2017: 12.6 C, +0.6 C from the station mean2018: 11.9 C, -0.1 C from the station mean2019: 13.1 C, +1.1 C from the station mean189619101920193019401950196019701980199020002010
One stripe for each of 105 complete years at Dayton Mcd, 1896 to 2019. Blue stripes are years cooler than the station's own mean of 12.0 C (53.6 F); red stripes are warmer. The coolest year was 1917, at 9.7 C (49.5 F), and the warmest was 1998, at 14.3 C (57.8 F). The strongest colour marks a difference of 2.4 C (4.3 F).
Annual mean temperature at Dayton Mcd as warming stripes, 1896 to 2019
YearAnnual mean temperatureDifference from the station mean
189612.5 C+0.52 C
189712.2 C+0.17 C
189812.3 C+0.36 C
189912.2 C+0.23 C
190012.5 C+0.48 C
190111.1 C-0.91 C
190211.3 C-0.69 C
190311.2 C-0.75 C
190410.0 C-1.94 C
190511.0 C-0.97 C
190611.7 C-0.32 C
190710.8 C-1.14 C
190812.2 C+0.17 C
190911.5 C-0.49 C
191011.1 C-0.93 C
191112.4 C+0.46 C
191210.6 C-1.36 C
191312.3 C+0.36 C
191411.5 C-0.44 C
191511.4 C-0.61 C
191611.5 C-0.46 C
19179.7 C-2.25 C
191811.7 C-0.29 C
191912.3 C+0.28 C
192011.3 C-0.72 C
192113.6 C+1.63 C
192212.7 C+0.68 C
192311.8 C-0.16 C
193411.9 C-0.10 C
193511.2 C-0.81 C
193611.5 C-0.48 C
193711.1 C-0.85 C
193812.6 C+0.63 C
193912.4 C+0.38 C
194010.8 C-1.18 C
194112.5 C+0.51 C
194211.9 C-0.12 C
194311.9 C-0.11 C
194412.6 C+0.61 C
194511.7 C-0.26 C
194613.0 C+1.01 C
194711.7 C-0.25 C
194812.3 C+0.30 C
194913.4 C+1.45 C
195011.4 C-0.54 C
195111.8 C-0.23 C
195212.6 C+0.65 C
195313.2 C+1.24 C
195413.1 C+1.11 C
195512.9 C+0.87 C
195612.7 C+0.76 C
195712.8 C+0.78 C
195811.3 C-0.66 C
195913.1 C+1.15 C
196012.0 C+0.03 C
196112.3 C+0.30 C
196212.1 C+0.11 C
196311.5 C-0.48 C
196413.0 C+1.03 C
196512.9 C+0.88 C
196611.7 C-0.27 C
196711.4 C-0.57 C
196811.8 C-0.22 C
196911.5 C-0.53 C
197112.2 C+0.26 C
197211.3 C-0.64 C
197411.9 C-0.08 C
197512.4 C+0.37 C
197611.2 C-0.80 C
197711.7 C-0.25 C
197810.6 C-1.36 C
197910.9 C-1.09 C
198011.3 C-0.65 C
198111.4 C-0.59 C
198211.7 C-0.24 C
198311.9 C-0.06 C
198411.6 C-0.42 C
198612.5 C+0.50 C
198713.1 C+1.08 C
198812.0 C0.00 C
198911.2 C-0.74 C
199013.1 C+1.11 C
199113.3 C+1.29 C
199211.7 C-0.26 C
199311.8 C-0.17 C
199412.2 C+0.20 C
199511.8 C-0.21 C
199611.4 C-0.63 C
199711.4 C-0.57 C
199814.3 C+2.34 C
200012.5 C+0.49 C
200113.2 C+1.17 C
200212.9 C+0.91 C
200311.5 C-0.53 C
200512.4 C+0.38 C
200613.0 C+1.05 C
200811.8 C-0.23 C
200911.8 C-0.22 C
201113.0 C+1.03 C
201311.5 C-0.46 C
201410.5 C-1.46 C
201612.8 C+0.85 C
201712.6 C+0.58 C
201811.9 C-0.10 C
201913.1 C+1.15 C

The annual mean temperature here has risen by 0.05 C (0.01 to 0.09) per decade over 1896 to 2019. In Fahrenheit: 0.09 F (0.02 to 0.17) per decade. The slope is a straight line fitted to 105 complete years; the brackets give its 95 percent interval.

Fitted temperature trends per decade at Dayton Mcd
MeasurePer decade (C)Per decade (F)PeriodComplete yearsReading
Annual mean temperature0.05 C (0.01 to 0.09) per decade0.09 F (0.02 to 0.17) per decade1896 to 2019105Rise
Mean daily maximum-0.03 C (-0.08 to 0.01) per decade-0.06 F (-0.14 to 0.03) per decade1896 to 2019105Not clearly different from zero
Mean daily minimum0.1 C (0.1 to 0.2) per decade0.2 F (0.2 to 0.3) per decade1896 to 2019105Rise

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 Dayton Mcd: the record and the median year
MeasureRecordYear of the recordMedian yearYears with a value
Hottest day (TXx)42.2 C (108.0 F)190136.7 C (98.1 F)121
Coldest night (TNn)-33.3 C (-27.9 F)1899-18.9 C (-2.0 F)121
Wettest day (Rx1day)118.1 mm (4.6 in)197959.1 mm (2.3 in)126
Wettest five days (Rx5day)227.1 mm (8.9 in)191389.1 mm (3.5 in)125
Longest dry spell (CDD)41 days193917 days126

Hottest day (TXx)

Hottest day (TXx) at Dayton Mcd by year The hottest day of the year at Dayton Mcd, 1893 to 2026. The record is 42.2 C (108.0 F) in 1901, marked on the chart; the median year is 36.7 C (98.1 F). 10203040501900192019401960198020002020Record: 42.2 C (108.0 F) in 1901
The hottest day of the year at Dayton Mcd, 1893 to 2026. The record is 42.2 C (108.0 F) in 1901, marked on the chart; the median year is 36.7 C (98.1 F).
Hottest day (TXx) at Dayton Mcd by year
YearHottest day (TXx)
189336.1 C (97.0 F)
189437.2 C (99.0 F)
189537.2 C (99.0 F)
189635.6 C (96.1 F)
189740.0 C (104.0 F)
189837.2 C (99.0 F)
189938.9 C (102.0 F)
190037.2 C (99.0 F)
190142.2 C (108.0 F)
190236.1 C (97.0 F)
190337.2 C (99.0 F)
190435.6 C (96.1 F)
190535.6 C (96.1 F)
190635.0 C (95.0 F)
190735.0 C (95.0 F)
190837.2 C (99.0 F)
190935.0 C (95.0 F)
191036.1 C (97.0 F)
191141.7 C (107.1 F)
191235.6 C (96.1 F)
191339.4 C (102.9 F)
191440.0 C (104.0 F)
191535.0 C (95.0 F)
191639.4 C (102.9 F)
191735.6 C (96.1 F)
191840.6 C (105.1 F)
191937.2 C (99.0 F)
192036.1 C (97.0 F)
192138.3 C (100.9 F)
192236.7 C (98.1 F)
192336.1 C (97.0 F)
192411.1 C (52.0 F)
193333.3 C (91.9 F)
193440.6 C (105.1 F)
193535.6 C (96.1 F)
193640.0 C (104.0 F)
193733.3 C (91.9 F)
193833.9 C (93.0 F)
193936.7 C (98.1 F)
194036.7 C (98.1 F)
194138.3 C (100.9 F)
194237.8 C (100.0 F)
194335.6 C (96.1 F)
194438.9 C (102.0 F)
194535.6 C (96.1 F)
194636.1 C (97.0 F)
194736.7 C (98.1 F)
194837.2 C (99.0 F)
194935.6 C (96.1 F)
195034.4 C (93.9 F)
195138.3 C (100.9 F)
195238.9 C (102.0 F)
195338.3 C (100.9 F)
195440.0 C (104.0 F)
195536.7 C (98.1 F)
195637.2 C (99.0 F)
195736.1 C (97.0 F)
195833.3 C (91.9 F)
195935.0 C (95.0 F)
196035.6 C (96.1 F)
196134.4 C (93.9 F)
196237.8 C (100.0 F)
196336.1 C (97.0 F)
196437.8 C (100.0 F)
196536.7 C (98.1 F)
196636.7 C (98.1 F)
196735.0 C (95.0 F)
196835.6 C (96.1 F)
196935.0 C (95.0 F)
197036.7 C (98.1 F)
197136.7 C (98.1 F)
197236.1 C (97.0 F)
197335.0 C (95.0 F)
197434.4 C (93.9 F)
197535.0 C (95.0 F)
197635.6 C (96.1 F)
197737.8 C (100.0 F)
197835.0 C (95.0 F)
197933.9 C (93.0 F)
198037.8 C (100.0 F)
198136.1 C (97.0 F)
198235.0 C (95.0 F)
198337.8 C (100.0 F)
198437.2 C (99.0 F)
198534.4 C (93.9 F)
198635.6 C (96.1 F)
198735.6 C (96.1 F)
198838.9 C (102.0 F)
198936.7 C (98.1 F)
199036.7 C (98.1 F)
199137.2 C (99.0 F)
199233.3 C (91.9 F)
199337.2 C (99.0 F)
199439.4 C (102.9 F)
199538.3 C (100.9 F)
199636.1 C (97.0 F)
199738.3 C (100.9 F)
199837.2 C (99.0 F)
199940.0 C (104.0 F)
200035.0 C (95.0 F)
200136.7 C (98.1 F)
200237.8 C (100.0 F)
200335.0 C (95.0 F)
200433.9 C (93.0 F)
200537.8 C (100.0 F)
200635.6 C (96.1 F)
200738.3 C (100.9 F)
200835.6 C (96.1 F)
200936.7 C (98.1 F)
201036.1 C (97.0 F)
201137.8 C (100.0 F)
201240.6 C (105.1 F)
201335.6 C (96.1 F)
201434.4 C (93.9 F)
201535.0 C (95.0 F)
201635.0 C (95.0 F)
201733.9 C (93.0 F)
201836.1 C (97.0 F)
201937.2 C (99.0 F)
202038.3 C (100.9 F)
202136.7 C (98.1 F)
2022n/a
2023n/a
2024n/a
2025n/a
2026n/a

Coldest night (TNn)

Coldest night (TNn) at Dayton Mcd by year The coldest night of the year at Dayton Mcd, 1893 to 2026. The record is -33.3 C (-27.9 F) in 1899, marked on the chart; the median year is -18.9 C (-2.0 F). -40-30-20-101900192019401960198020002020Record: -33.3 C (-27.9 F) in 1899
The coldest night of the year at Dayton Mcd, 1893 to 2026. The record is -33.3 C (-27.9 F) in 1899, marked on the chart; the median year is -18.9 C (-2.0 F).
Coldest night (TNn) at Dayton Mcd by year
YearColdest night (TNn)
1893-12.2 C (10.0 F)
1894-21.1 C (-6.0 F)
1895-26.7 C (-16.1 F)
1896-20.6 C (-5.1 F)
1897-24.4 C (-11.9 F)
1898-26.1 C (-15.0 F)
1899-33.3 C (-27.9 F)
1900-22.8 C (-9.0 F)
1901-24.4 C (-11.9 F)
1902-22.2 C (-8.0 F)
1903-20.6 C (-5.1 F)
1904-27.8 C (-18.0 F)
1905-22.8 C (-9.0 F)
1906-21.7 C (-7.1 F)
1907-18.3 C (-0.9 F)
1908-17.8 C (0.0 F)
1909-21.1 C (-6.0 F)
1910-23.9 C (-11.0 F)
1911-13.9 C (7.0 F)
1912-28.3 C (-18.9 F)
1913-17.8 C (0.0 F)
1914-22.2 C (-8.0 F)
1915-23.9 C (-11.0 F)
1916-19.4 C (-2.9 F)
1917-25.0 C (-13.0 F)
1918-27.2 C (-17.0 F)
1919-16.7 C (1.9 F)
1920-18.3 C (-0.9 F)
1921-10.6 C (12.9 F)
1922-18.3 C (-0.9 F)
1923-17.2 C (1.0 F)
1924-22.2 C (-8.0 F)
1933-17.8 C (0.0 F)
1934-21.7 C (-7.1 F)
1935-18.9 C (-2.0 F)
1936-26.7 C (-16.1 F)
1937-15.0 C (5.0 F)
1938-15.0 C (5.0 F)
1939-15.0 C (5.0 F)
1940-23.3 C (-9.9 F)
1941-14.4 C (6.1 F)
1942-21.1 C (-6.0 F)
1943-17.2 C (1.0 F)
1944-16.7 C (1.9 F)
1945-17.8 C (0.0 F)
1946-16.1 C (3.0 F)
1947-17.8 C (0.0 F)
1948-21.1 C (-6.0 F)
1949-15.0 C (5.0 F)
1950-18.3 C (-0.9 F)
1951-22.8 C (-9.0 F)
1952-12.2 C (10.0 F)
1953-15.0 C (5.0 F)
1954-13.9 C (7.0 F)
1955-18.9 C (-2.0 F)
1956-13.3 C (8.1 F)
1957-18.3 C (-0.9 F)
1958-19.4 C (-2.9 F)
1959-21.1 C (-6.0 F)
1960-18.3 C (-0.9 F)
1961-21.7 C (-7.1 F)
1962-22.2 C (-8.0 F)
1963-26.1 C (-15.0 F)
1964-14.4 C (6.1 F)
1965-18.3 C (-0.9 F)
1966-21.1 C (-6.0 F)
1967-18.9 C (-2.0 F)
1968-20.6 C (-5.1 F)
1969-16.7 C (1.9 F)
1970-21.7 C (-7.1 F)
1971-17.8 C (0.0 F)
1972-24.4 C (-11.9 F)
1973-13.3 C (8.1 F)
1974-15.6 C (3.9 F)
1975-15.6 C (3.9 F)
1976-19.4 C (-2.9 F)
1977-27.8 C (-18.0 F)
1978-20.0 C (-4.0 F)
1979-21.1 C (-6.0 F)
1980-16.7 C (1.9 F)
1981-19.4 C (-2.9 F)
1982-26.7 C (-16.1 F)
1983-23.9 C (-11.0 F)
1984-25.0 C (-13.0 F)
1985-29.4 C (-20.9 F)
1986-17.8 C (0.0 F)
1987-17.2 C (1.0 F)
1988-18.9 C (-2.0 F)
1989-26.7 C (-16.1 F)
1990-15.0 C (5.0 F)
1991-15.6 C (3.9 F)
1992-20.0 C (-4.0 F)
1993-19.4 C (-2.9 F)
1994-27.8 C (-18.0 F)
1995-18.9 C (-2.0 F)
1996-20.0 C (-4.0 F)
1997-19.4 C (-2.9 F)
1998-10.6 C (12.9 F)
1999-19.4 C (-2.9 F)
2000-18.9 C (-2.0 F)
2001-12.2 C (10.0 F)
2002-14.4 C (6.1 F)
2003-18.9 C (-2.0 F)
2004-13.9 C (7.0 F)
2005-16.7 C (1.9 F)
2006-13.9 C (7.0 F)
2007-12.2 C (10.0 F)
2008-16.1 C (3.0 F)
2009-21.7 C (-7.1 F)
2010-18.3 C (-0.9 F)
2011-18.9 C (-2.0 F)
2012-13.3 C (8.1 F)
2013-16.7 C (1.9 F)
2014-25.0 C (-13.0 F)
2015-22.2 C (-8.0 F)
2016-18.3 C (-0.9 F)
2017-21.7 C (-7.1 F)
2018-23.3 C (-9.9 F)
2019-23.3 C (-9.9 F)
2020-13.9 C (7.0 F)
2021-11.1 C (12.0 F)
2022n/a
2023n/a
2024n/a
2025n/a
2026n/a

Wettest day (Rx1day)

Wettest day (Rx1day) at Dayton Mcd by year The wettest day of the year at Dayton Mcd, 1893 to 2026. The record is 118.1 mm (4.6 in) in 1979, marked on the chart; the median year is 59.1 mm (2.3 in). 2550751001251900192019401960198020002020Record: 118.1 mm (4.6 in) in 1979
The wettest day of the year at Dayton Mcd, 1893 to 2026. The record is 118.1 mm (4.6 in) in 1979, marked on the chart; the median year is 59.1 mm (2.3 in).
Wettest day (Rx1day) at Dayton Mcd by year
YearWettest day (Rx1day)
189352.1 mm (2.1 in)
189446.7 mm (1.8 in)
189547.2 mm (1.9 in)
189655.6 mm (2.2 in)
189783.3 mm (3.3 in)
189848.5 mm (1.9 in)
189938.1 mm (1.5 in)
190036.8 mm (1.4 in)
190143.2 mm (1.7 in)
190271.4 mm (2.8 in)
190356.9 mm (2.2 in)
190445.7 mm (1.8 in)
190583.6 mm (3.3 in)
190653.8 mm (2.1 in)
190778.7 mm (3.1 in)
190857.7 mm (2.3 in)
190956.4 mm (2.2 in)
191097.0 mm (3.8 in)
191150.8 mm (2.0 in)
191252.6 mm (2.1 in)
191383.3 mm (3.3 in)
191440.1 mm (1.6 in)
191559.9 mm (2.4 in)
191686.9 mm (3.4 in)
191762.7 mm (2.5 in)
191874.2 mm (2.9 in)
191966.3 mm (2.6 in)
192047.8 mm (1.9 in)
192147.5 mm (1.9 in)
192280.3 mm (3.2 in)
192343.7 mm (1.7 in)
192430.5 mm (1.2 in)
193347.2 mm (1.9 in)
193442.9 mm (1.7 in)
193547.0 mm (1.9 in)
193651.8 mm (2.0 in)
193771.4 mm (2.8 in)
193858.4 mm (2.3 in)
193944.5 mm (1.8 in)
194047.2 mm (1.9 in)
194161.2 mm (2.4 in)
194245.7 mm (1.8 in)
194367.8 mm (2.7 in)
194438.6 mm (1.5 in)
194559.9 mm (2.4 in)
194641.9 mm (1.6 in)
194765.5 mm (2.6 in)
194879.2 mm (3.1 in)
194967.8 mm (2.7 in)
195067.8 mm (2.7 in)
195151.1 mm (2.0 in)
195273.4 mm (2.9 in)
195332.3 mm (1.3 in)
195427.7 mm (1.1 in)
195569.6 mm (2.7 in)
195648.3 mm (1.9 in)
195759.7 mm (2.4 in)
195848.8 mm (1.9 in)
195974.4 mm (2.9 in)
196066.0 mm (2.6 in)
196180.3 mm (3.2 in)
196240.6 mm (1.6 in)
196362.2 mm (2.4 in)
196469.6 mm (2.7 in)
196548.5 mm (1.9 in)
196643.7 mm (1.7 in)
196769.9 mm (2.8 in)
196875.9 mm (3.0 in)
196966.0 mm (2.6 in)
197072.6 mm (2.9 in)
197143.4 mm (1.7 in)
197254.4 mm (2.1 in)
197369.9 mm (2.8 in)
197464.3 mm (2.5 in)
197561.5 mm (2.4 in)
197639.1 mm (1.5 in)
197753.8 mm (2.1 in)
197845.2 mm (1.8 in)
1979118.1 mm (4.6 in)
1980104.1 mm (4.1 in)
198154.9 mm (2.2 in)
198269.9 mm (2.8 in)
198355.4 mm (2.2 in)
198432.3 mm (1.3 in)
198566.0 mm (2.6 in)
198655.9 mm (2.2 in)
198767.3 mm (2.6 in)
198862.2 mm (2.4 in)
198969.3 mm (2.7 in)
199068.6 mm (2.7 in)
199199.1 mm (3.9 in)
199247.0 mm (1.9 in)
199353.1 mm (2.1 in)
199452.6 mm (2.1 in)
199580.0 mm (3.1 in)
199663.0 mm (2.5 in)
199775.2 mm (3.0 in)
199872.4 mm (2.9 in)
199940.9 mm (1.6 in)
200066.8 mm (2.6 in)
200152.1 mm (2.1 in)
2002110.7 mm (4.4 in)
200343.9 mm (1.7 in)
200471.1 mm (2.8 in)
200561.0 mm (2.4 in)
200670.4 mm (2.8 in)
200772.1 mm (2.8 in)
200868.6 mm (2.7 in)
200951.3 mm (2.0 in)
201040.6 mm (1.6 in)
201191.9 mm (3.6 in)
201234.0 mm (1.3 in)
201369.6 mm (2.7 in)
201445.2 mm (1.8 in)
201564.8 mm (2.6 in)
201642.2 mm (1.7 in)
201762.2 mm (2.4 in)
201857.9 mm (2.3 in)
201931.5 mm (1.2 in)
202069.3 mm (2.7 in)
2021105.9 mm (4.2 in)
202258.4 mm (2.3 in)
202366.3 mm (2.6 in)
202457.7 mm (2.3 in)
202547.0 mm (1.9 in)
2026109.2 mm (4.3 in)

Wettest five days (Rx5day)

Wettest five days (Rx5day) at Dayton Mcd by year The wettest five days of the year at Dayton Mcd, 1893 to 2026. The record is 227.1 mm (8.9 in) in 1913, marked on the chart; the median year is 89.1 mm (3.5 in). 0501001502002501900192019401960198020002020Record: 227.1 mm (8.9 in) in 1913
The wettest five days of the year at Dayton Mcd, 1893 to 2026. The record is 227.1 mm (8.9 in) in 1913, marked on the chart; the median year is 89.1 mm (3.5 in).
Wettest five days (Rx5day) at Dayton Mcd by year
YearWettest five days (Rx5day)
1893n/a
189465.5 mm (2.6 in)
189569.6 mm (2.7 in)
189698.6 mm (3.9 in)
189794.7 mm (3.7 in)
189899.3 mm (3.9 in)
189958.9 mm (2.3 in)
190061.7 mm (2.4 in)
190164.5 mm (2.5 in)
1902111.0 mm (4.4 in)
1903133.8 mm (5.3 in)
1904109.7 mm (4.3 in)
1905137.7 mm (5.4 in)
190695.3 mm (3.8 in)
1907112.3 mm (4.4 in)
190884.1 mm (3.3 in)
190979.3 mm (3.1 in)
191055.9 mm (2.2 in)
191172.7 mm (2.9 in)
191253.8 mm (2.1 in)
1913227.1 mm (8.9 in)
191470.4 mm (2.8 in)
1915102.1 mm (4.0 in)
1916133.7 mm (5.3 in)
191778.7 mm (3.1 in)
191897.1 mm (3.8 in)
1919100.1 mm (3.9 in)
192097.0 mm (3.8 in)
1921101.7 mm (4.0 in)
192297.1 mm (3.8 in)
192384.0 mm (3.3 in)
192431.0 mm (1.2 in)
193362.9 mm (2.5 in)
193462.5 mm (2.5 in)
193582.6 mm (3.3 in)
193689.1 mm (3.5 in)
1937135.9 mm (5.4 in)
1938134.6 mm (5.3 in)
193969.1 mm (2.7 in)
194087.1 mm (3.4 in)
1941104.9 mm (4.1 in)
194257.7 mm (2.3 in)
1943107.2 mm (4.2 in)
194489.6 mm (3.5 in)
1945113.5 mm (4.5 in)
194683.0 mm (3.3 in)
194785.3 mm (3.4 in)
194889.4 mm (3.5 in)
194983.3 mm (3.3 in)
1950105.6 mm (4.2 in)
195160.7 mm (2.4 in)
195297.6 mm (3.8 in)
195348.3 mm (1.9 in)
195449.3 mm (1.9 in)
195585.1 mm (3.4 in)
195684.9 mm (3.3 in)
195796.8 mm (3.8 in)
1958116.0 mm (4.6 in)
1959139.1 mm (5.5 in)
196070.1 mm (2.8 in)
1961137.2 mm (5.4 in)
196283.3 mm (3.3 in)
1963102.6 mm (4.0 in)
1964140.7 mm (5.5 in)
196595.2 mm (3.7 in)
196663.3 mm (2.5 in)
1967102.6 mm (4.0 in)
1968145.0 mm (5.7 in)
1969106.9 mm (4.2 in)
197075.9 mm (3.0 in)
197170.4 mm (2.8 in)
197267.8 mm (2.7 in)
197398.9 mm (3.9 in)
1974111.5 mm (4.4 in)
197589.7 mm (3.5 in)
197674.9 mm (2.9 in)
197759.9 mm (2.4 in)
197863.3 mm (2.5 in)
1979118.1 mm (4.6 in)
1980124.7 mm (4.9 in)
198161.8 mm (2.4 in)
198284.3 mm (3.3 in)
1983122.5 mm (4.8 in)
198459.4 mm (2.3 in)
198593.3 mm (3.7 in)
198677.4 mm (3.0 in)
198776.7 mm (3.0 in)
1988115.3 mm (4.5 in)
1989145.5 mm (5.7 in)
1990145.8 mm (5.7 in)
1991129.1 mm (5.1 in)
199275.2 mm (3.0 in)
199378.0 mm (3.1 in)
199478.0 mm (3.1 in)
1995112.3 mm (4.4 in)
1996116.9 mm (4.6 in)
1997100.6 mm (4.0 in)
1998101.8 mm (4.0 in)
199960.5 mm (2.4 in)
200083.0 mm (3.3 in)
200172.7 mm (2.9 in)
2002134.1 mm (5.3 in)
2003110.0 mm (4.3 in)
2004131.5 mm (5.2 in)
2005131.6 mm (5.2 in)
200687.5 mm (3.4 in)
200782.3 mm (3.2 in)
200888.7 mm (3.5 in)
200968.0 mm (2.7 in)
201070.0 mm (2.8 in)
2011116.5 mm (4.6 in)
201271.7 mm (2.8 in)
201397.3 mm (3.8 in)
201469.9 mm (2.8 in)
201589.1 mm (3.5 in)
201679.3 mm (3.1 in)
201786.9 mm (3.4 in)
2018117.0 mm (4.6 in)
201960.7 mm (2.4 in)
202096.4 mm (3.8 in)
2021114.5 mm (4.5 in)
202273.8 mm (2.9 in)
202382.8 mm (3.3 in)
202486.9 mm (3.4 in)
2025106.9 mm (4.2 in)
2026130.0 mm (5.1 in)

Longest dry spell (CDD)

Longest dry spell (CDD) at Dayton Mcd by year The longest dry spell of the year at Dayton Mcd, 1893 to 2026. The record is 41 days in 1939, marked on the chart; the median year is 17 days. 010203040501900192019401960198020002020Record: 41 days in 1939
The longest dry spell of the year at Dayton Mcd, 1893 to 2026. The record is 41 days in 1939, marked on the chart; the median year is 17 days.
Longest dry spell (CDD) at Dayton Mcd by year
YearLongest dry spell (CDD)
18932 days
189416 days
189520 days
189611 days
189724 days
189813 days
189915 days
190015 days
190125 days
190220 days
190321 days
190429 days
190517 days
190614 days
190718 days
190840 days
190914 days
191020 days
191111 days
191214 days
191317 days
191423 days
191516 days
191614 days
191728 days
191816 days
191918 days
192027 days
192115 days
192214 days
192317 days
19246 days
193317 days
193420 days
193518 days
193635 days
193714 days
193823 days
193941 days
194014 days
194120 days
194215 days
194319 days
194428 days
194515 days
194635 days
194718 days
194821 days
194912 days
195024 days
195117 days
195222 days
195325 days
195413 days
195516 days
195617 days
195723 days
195822 days
195913 days
196020 days
196117 days
196218 days
196335 days
196419 days
196529 days
196616 days
196726 days
196838 days
196914 days
197015 days
197112 days
197213 days
197317 days
197413 days
197515 days
197623 days
197729 days
197816 days
197911 days
198014 days
198124 days
198220 days
198326 days
198418 days
198524 days
198616 days
198717 days
198816 days
198912 days
199013 days
199115 days
199217 days
199317 days
199415 days
199519 days
199618 days
199713 days
199816 days
199925 days
200015 days
200116 days
200216 days
200317 days
200425 days
200518 days
200616 days
200718 days
200818 days
200917 days
201027 days
201112 days
201219 days
201315 days
201418 days
201513 days
201617 days
201714 days
201814 days
201925 days
202015 days
202113 days
202235 days
202317 days
202416 days
202521 days
202615 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

105 years with a frost

Across 105 years with a frost, the median last spring frost at Dayton Mcd falls on 15 April and the median first autumn frost on 26 October, which leaves a median of 194 days between them.

In 1983 to 2019 the median growing season was 203 days. That is 34 days more than in 1896 to 1935.

Fitted over all years, the growing season changes by +3.4 days per decade at this station.

Frost dates and growing season at Dayton Mcd
MeasureMedian, all yearsEarliest period (1896 to 1935)Recent period (1983 to 2019)Recent against earliestFitted trend
Last spring frost15 April27 April9 April18 days earlier-1.6 days per decade
First autumn frost26 October12 October30 October18 days later+1.8 days per decade
Growing days194 days169 days203 days34 days more+3.4 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

114 years, 1896 to 2025

A day with at least 58.8 mm (2.3 in) of rain is expected about once in 2 years. A day with at least 106.5 mm (4.2 in) of rain is expected about once in 100 years.

Rainfall return levels at Dayton Mcd: the daily rain expected about once in a given number of years
Expected about once inA day with at leastNote
2 years58.8 mm (2.3 in)
5 years73.8 mm (2.9 in)
10 years82.7 mm (3.3 in)
25 years93.1 mm (3.7 in)
50 years100.1 mm (3.9 in)
100 years106.5 mm (4.2 in)

The levels come from a generalised extreme value (GEV) distribution fitted by L-moments to the wettest-day total of each year, 114 years of values from 1896 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: 118.1 mm (4.6 in) in 1979; 110.7 mm (4.4 in) in 2002; 105.9 mm (4.2 in) in 2021.

Download the Data

  • Data for Dayton Mcd standing records by year: CSV or JSON. Field meanings are on the data page.
  • Data for Dayton Mcd 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 2026-10-12 (12 October 2026). Records are computed by this site and are not official.

Data as of . Last revised (2026-10-13).