Built 2026-10-17 (17 October 2026)

Marengo Weather Records (USC00125322)

Record envelope, standing records and threshold days for Marengo (USC00125322), Indiana, United States, with 122 years of record.

Key Facts for Marengo

  • Marengo (USC00125322) is a weather station in Indiana, United States at 38.38 latitude and -86.34 longitude, 177 m (580 ft) above sea level.
  • The station reports from 1893 to 2014, 122 years of record.
  • 1,464 records set at Marengo still stand.
  • Records are tracked for tmax, tmin, prcp, snow: an element needs 30 years of data to be eligible.
  • Marengo set a daily record precipitation of 53.3 mm (2.1 in) on 18 November 2013.

About the Station

  • Location: Indiana, United States, 38.38 latitude, -86.34 longitude.
  • Elevation: 177 m (580 ft).
  • Period of record: 1893 to 2014, 122 years.
  • Eligible elements: tmax, tmin, prcp, snow.

Daily Record Envelope and 2026

0 days at or beyond a record
Daily record high and record low at Marengo, with 2026 drawn through them The band shows the record high and record low for each calendar day at Marengo. 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 Marengo. 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 Marengo, with 2026 drawn through them
MonthHighest record highLowest record low2026 highest maximum2026 lowest minimum
Jan25.6 C (78.1 F)-33.3 C (-27.9 F)n/an/a
Feb26.1 C (79.0 F)-33.3 C (-27.9 F)n/an/a
Mar34.4 C (93.9 F)-19.4 C (-2.9 F)n/an/a
Apr33.3 C (91.9 F)-10.0 C (14.0 F)n/an/a
May35.6 C (96.1 F)-3.9 C (25.0 F)n/an/a
Jun41.1 C (106.0 F)1.1 C (34.0 F)n/an/a
Jul43.3 C (109.9 F)5.0 C (41.0 F)n/an/a
Aug42.2 C (108.0 F)3.3 C (37.9 F)n/an/a
Sep39.4 C (102.9 F)-5.6 C (21.9 F)n/an/a
Oct33.3 C (91.9 F)-12.8 C (9.0 F)n/an/a
Nov31.1 C (88.0 F)-16.7 C (1.9 F)n/an/a
Dec22.2 C (72.0 F)-34.4 C (-29.9 F)n/an/a

Which Years Hold Standing Records

1,464 standing records
Standing records at Marengo by the year they were set 1,464 records at Marengo still stand. 1930 holds the most, with 53. 02040601896: 441897: 271898: 311899: 401900: 281901: 361902: 231903: 331904: 201905: 101906: 261907: 311908: 131909: 131910: 161911: 261912: 221913: 391914: 211915: 271916: 361917: 441918: 441919: 181920: 261921: 291922: 191923: 231924: 211925: 381926: 251927: 281928: 301929: 391930: 531931: 251932: 191933: 271934: 211935: 261936: 531937: 241938: 211939: 271940: 421941: 171942: 301943: 291944: 241963: 81964: 221965: 191966: 91967: 141968: 31969: 51896190219081914192019261932193819441968
1,464 records at Marengo still stand. 1930 holds the most, with 53.
Standing records at Marengo by the year they were set
Year setStanding records
189644
189727
189831
189940
190028
190136
190223
190333
190420
190510
190626
190731
190813
190913
191016
191126
191222
191339
191421
191527
191636
191744
191844
191918
192026
192129
192219
192323
192421
192538
192625
192728
192830
192939
193053
193125
193219
193327
193421
193526
193653
193724
193821
193927
194042
194117
194230
194329
194424
19638
196422
196519
19669
196714
19683
19695

All-Time Record Progression

5 new records
When Marengo set new all-time records 5 all-time records were set at Marengo between 6 August 1930 and 1 February 1966. Each dot is a new record. Record high maximum temperatureRecord daily snowfall6 August 1930: Record high maximum temperature 41.7 C (107.1 F)8 August 1930: Record high maximum temperature 42.2 C (108.0 F)13 July 1936: Record high maximum temperature 42.8 C (109.0 F)14 July 1936: Record high maximum temperature 43.3 C (109.9 F)1 February 1966: Record daily snowfall 31.8 cm (12.5 in)19301935194019451950195519601965
5 all-time records were set at Marengo between 6 August 1930 and 1 February 1966. Each dot is a new record.
When Marengo set new all-time records
DateKindDetail
1930-08-06Record high maximum temperatureRecord high maximum temperature 41.7 C (107.1 F)
1930-08-08Record high maximum temperatureRecord high maximum temperature 42.2 C (108.0 F)
1936-07-13Record high maximum temperatureRecord high maximum temperature 42.8 C (109.0 F)
1936-07-14Record high maximum temperatureRecord high maximum temperature 43.3 C (109.9 F)
1966-02-01Record daily snowfallRecord daily snowfall 31.8 cm (12.5 in)

Wettest Day of Each Month

Nov: 177.8 mm (7.0 in)
Record daily precipitation for each month at Marengo The wettest day on record for each calendar month at Marengo. The most was 177.8 mm (7.0 in) on 24 November 1895. 050100150200 Jan: 139.7 mm (5.5 in), 6 January 1895 Jan Feb: 80.5 mm (3.2 in), 23 February 1909 Feb Mar: 125.7 mm (4.9 in), 9 March 1964 Mar Apr: 127.0 mm (5.0 in), 11 April 1893 Apr May: 114.3 mm (4.5 in), 28 May 1893 May Jun: 80.5 mm (3.2 in), 26 June 1898 Jun Jul: 96.5 mm (3.8 in), 18 July 1938 Jul Aug: 83.8 mm (3.3 in), 24 August 1928 Aug Sep: 74.7 mm (2.9 in), 15 September 1965 Sep Oct: 101.6 mm (4.0 in), 5 October 1910 Oct Nov: 177.8 mm (7.0 in), 24 November 1895 Nov Dec: 94.0 mm (3.7 in), 31 December 1932 Dec
The wettest day on record for each calendar month at Marengo. The most was 177.8 mm (7.0 in) on 24 November 1895.
Record daily precipitation for each month at Marengo
MonthRecord daily precipitation (mm)Date
Jan139.7 mm (5.5 in)6 January 1895
Feb80.5 mm (3.2 in)23 February 1909
Mar125.7 mm (4.9 in)9 March 1964
Apr127.0 mm (5.0 in)11 April 1893
May114.3 mm (4.5 in)28 May 1893
Jun80.5 mm (3.2 in)26 June 1898
Jul96.5 mm (3.8 in)18 July 1938
Aug83.8 mm (3.3 in)24 August 1928
Sep74.7 mm (2.9 in)15 September 1965
Oct101.6 mm (4.0 in)5 October 1910
Nov177.8 mm (7.0 in)24 November 1895
Dec94.0 mm (3.7 in)31 December 1932

Period of Record Coverage

1896 to 1969
Days with data per year at Marengo 56 years of record at Marengo, 1896 to 1969. 14 years have data for under 90 percent of days and are left out of rankings: 1896, 1913, 1914, 1916, 1917, 1920, 1922, 1923 and others. 1896: 286 of 366 days1897: 364 of 365 days1898: 364 of 365 days1899: 361 of 365 days1900: 364 of 365 days1901: 357 of 365 days1902: 364 of 365 days1903: 365 of 365 days1904: 364 of 366 days1905: 361 of 365 days1906: 359 of 365 days1907: 355 of 365 days1908: 360 of 366 days1909: 333 of 365 days1910: 340 of 365 days1911: 364 of 365 days1912: 348 of 366 days1913: 302 of 365 days1914: 319 of 365 days1915: 330 of 365 days1916: 319 of 366 days1917: 267 of 365 days1918: 349 of 365 days1919: 356 of 365 days1920: 296 of 366 days1921: 333 of 365 days1922: 311 of 365 days1923: 314 of 365 days1924: 330 of 366 days1925: 338 of 365 days1926: 339 of 365 days1927: 348 of 365 days1928: 356 of 366 days1929: 351 of 365 days1930: 349 of 365 days1931: 353 of 365 days1932: 356 of 366 days1933: 349 of 365 days1934: 357 of 365 days1935: 359 of 365 days1936: 357 of 366 days1937: 359 of 365 days1938: 358 of 365 days1939: 362 of 365 days1940: 359 of 366 days1941: 242 of 365 days1942: 362 of 365 days1943: 359 of 365 days1944: 323 of 366 days1963: 153 of 365 days1964: 366 of 366 days1965: 363 of 365 days1966: 344 of 365 days1967: 320 of 365 days1968: 221 of 366 days1969: 114 of 365 days19001910192019301940
56 years of record at Marengo, 1896 to 1969. 14 years have data for under 90 percent of days and are left out of rankings: 1896, 1913, 1914, 1916, 1917, 1920, 1922, 1923 and others.
Days with data per year at Marengo
YearDays with dataShare of yearComplete
189628678%No
1897364100%Yes
1898364100%Yes
189936199%Yes
1900364100%Yes
190135798%Yes
1902364100%Yes
1903365100%Yes
190436499%Yes
190536199%Yes
190635998%Yes
190735597%Yes
190836098%Yes
190933391%Yes
191034093%Yes
1911364100%Yes
191234895%Yes
191330283%No
191431987%No
191533090%Yes
191631987%No
191726773%No
191834996%Yes
191935698%Yes
192029681%No
192133391%Yes
192231185%No
192331486%No
192433090%Yes
192533893%Yes
192633993%Yes
192734895%Yes
192835697%Yes
192935196%Yes
193034996%Yes
193135397%Yes
193235697%Yes
193334996%Yes
193435798%Yes
193535998%Yes
193635798%Yes
193735998%Yes
193835898%Yes
193936299%Yes
194035998%Yes
194124266%No
194236299%Yes
194335998%Yes
194432388%No
196315342%No
1964366100%Yes
196536399%Yes
196634494%Yes
196732088%No
196822160%No
196911431%No

Latest Records

20
Latest records at Marengo
DateStationRecordValueBeat old record byOld record stoodSignificance
18 November 2013Marengo, USdaily rain53.3 mm (2.1 in)16.5 mm (0.6 in)92 years46 of 100 (Notable)
30 October 2013Marengo, USdaily rain52.3 mm (2.1 in)37.1 mm (1.5 in)94 years64 of 100 (Major)
11 September 2013Marengo, USdaily rain52.3 mm (2.1 in)6.1 mm (0.24 in)108 years44 of 100 (Notable)
27 June 2013Marengo, USdaily rain77.5 mm (3.1 in)41.2 mm (1.6 in)103 years71 of 100 (Major)
18 April 1969Marengo, USdaily rain27.4 mm (1.1 in)2.0 mm (0.08 in)74 years30 of 100 (Routine)
2 April 1969Marengo, USdaily rain20.3 mm (0.8 in)3.8 mm (0.15 in)51 years20 of 100 (Routine)
31 March 1969Marengo, USdaily low min-11.1 C (12.0 F)1.7 C (3.1 F)46 years22 of 100 (Routine)
22 March 1969Marengo, USdaily low min-7.2 C (19.0 F)0.5 C (0.9 F)28 years15 of 100 (Routine)
11 March 1969Marengo, USdaily low max0.0 C (32.0 F)0.6 C (1.1 F)44 years20 of 100 (Routine)
30 January 1969Marengo, USdaily high min8.9 C (48.0 F)5.6 C (10.1 F)45 years27 of 100 (Routine)
29 January 1969Marengo, USdaily high min9.4 C (48.9 F)2.2 C (4.0 F)55 years25 of 100 (Routine)
28 January 1969Marengo, USdaily rain44.5 mm (1.8 in)31.3 mm (1.2 in)57 years44 of 100 (Notable)
17 January 1969Marengo, USdaily rain43.9 mm (1.7 in)4.5 mm (0.18 in)71 years30 of 100 (Routine)
28 December 1968Marengo, USdaily rain19.8 mm (0.8 in)1.3 mm (0.05 in)25 years15 of 100 (Routine)
25 December 1968Marengo, USdaily low max-3.9 C (25.0 F)1.7 C (3.1 F)44 years22 of 100 (Routine)
3 December 1968Marengo, USdaily rain20.1 mm (0.8 in)1.8 mm (0.07 in)4 years9 of 100 (Routine)
28 November 1968Marengo, USdaily rain31.8 mm (1.3 in)10.2 mm (0.4 in)50 years28 of 100 (Routine)
5 September 1968Marengo, USdaily rain43.2 mm (1.7 in)15.3 mm (0.6 in)42 years30 of 100 (Routine)
26 May 1968Marengo, USdaily rain44.5 mm (1.8 in)16.6 mm (0.7 in)35 years29 of 100 (Routine)
15 May 1968Marengo, USdaily high min18.3 C (64.9 F)2.7 C (4.9 F)55 years28 of 100 (Routine)

Climate Trend

35 complete years, 1897 to 1965
Annual mean temperature at Marengo as warming stripes, 1897 to 1965 One stripe for each of 35 complete years at Marengo, 1897 to 1965. Blue stripes are years cooler than the station's own mean of 12.6 C (54.7 F); red stripes are warmer. The coolest year was 1940, at 11.0 C (51.9 F), and the warmest was 1921, at 14.1 C (57.4 F). The strongest colour marks a difference of 1.6 C (2.9 F). 1897: 13.2 C, +0.6 C from the station mean1898: 13.3 C, +0.7 C from the station mean1899: 12.3 C, -0.3 C from the station mean1900: 13.3 C, +0.7 C from the station mean1901: 12.0 C, -0.6 C from the station mean1902: 12.4 C, -0.2 C from the station mean1903: 12.6 C, 0.0 C from the station mean1904: 11.8 C, -0.8 C from the station mean1906: 12.6 C, 0.0 C from the station mean1907: 12.7 C, +0.1 C from the station mean1908: 13.7 C, +1.1 C from the station mean1910: 11.5 C, -1.1 C from the station mean1911: 13.2 C, +0.6 C from the station mean1918: 11.9 C, -0.7 C from the station mean1919: 12.7 C, +0.1 C from the station mean1921: 14.1 C, +1.5 C from the station mean1925: 12.0 C, -0.6 C from the station mean1927: 12.9 C, +0.3 C from the station mean1928: 12.0 C, -0.6 C from the station mean1929: 11.8 C, -0.8 C from the station mean1930: 12.5 C, -0.1 C from the station mean1931: 13.0 C, +0.4 C from the station mean1932: 12.5 C, -0.1 C from the station mean1933: 13.2 C, +0.6 C from the station mean1934: 12.7 C, +0.1 C from the station mean1935: 12.3 C, -0.3 C from the station mean1936: 12.8 C, +0.2 C from the station mean1937: 12.0 C, -0.6 C from the station mean1938: 13.4 C, +0.8 C from the station mean1939: 12.9 C, +0.3 C from the station mean1940: 11.0 C, -1.6 C from the station mean1942: 12.9 C, +0.3 C from the station mean1943: 12.3 C, -0.3 C from the station mean1964: 12.6 C, 0.0 C from the station mean1965: 12.6 C, 0.0 C from the station mean1897191019201930194019501960
One stripe for each of 35 complete years at Marengo, 1897 to 1965. Blue stripes are years cooler than the station's own mean of 12.6 C (54.7 F); red stripes are warmer. The coolest year was 1940, at 11.0 C (51.9 F), and the warmest was 1921, at 14.1 C (57.4 F). The strongest colour marks a difference of 1.6 C (2.9 F).
Annual mean temperature at Marengo as warming stripes, 1897 to 1965
YearAnnual mean temperatureDifference from the station mean
189713.2 C+0.63 C
189813.3 C+0.72 C
189912.3 C-0.28 C
190013.3 C+0.71 C
190112.0 C-0.64 C
190212.4 C-0.19 C
190312.6 C+0.02 C
190411.8 C-0.78 C
190612.6 C+0.01 C
190712.7 C+0.10 C
190813.7 C+1.15 C
191011.5 C-1.07 C
191113.2 C+0.63 C
191811.9 C-0.67 C
191912.7 C+0.08 C
192114.1 C+1.54 C
192512.0 C-0.55 C
192712.9 C+0.34 C
192812.0 C-0.63 C
192911.8 C-0.76 C
193012.5 C-0.05 C
193113.0 C+0.39 C
193212.5 C-0.06 C
193313.2 C+0.56 C
193412.7 C+0.09 C
193512.3 C-0.31 C
193612.8 C+0.17 C
193712.0 C-0.58 C
193813.4 C+0.76 C
193912.9 C+0.34 C
194011.0 C-1.55 C
194212.9 C+0.29 C
194312.3 C-0.28 C
196412.6 C0.00 C
196512.6 C+0.04 C

The fitted trend in annual mean temperature here over 1897 to 1965 is -0.04 C (-0.16 to 0.09) per decade. The interval includes zero, so the trend is not clearly different from zero. In Fahrenheit: -0.1 F (-0.3 to 0.2) per decade. The slope is a straight line fitted to 35 complete years; the brackets give its 95 percent interval.

Fitted temperature trends per decade at Marengo
MeasurePer decade (C)Per decade (F)PeriodComplete yearsReading
Annual mean temperature-0.04 C (-0.16 to 0.09) per decade-0.1 F (-0.3 to 0.2) per decade1897 to 196535Not clearly different from zero
Mean daily maximum0.2 C (0.1 to 0.4) per decade0.4 F (0.1 to 0.7) per decade1897 to 196535Rise
Mean daily minimum-0.3 C (-0.4 to -0.1) per decade-0.5 F (-0.8 to -0.3) per decade1897 to 196535Fall

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 2014
Yearly extremes at Marengo: the record and the median year
MeasureRecordYear of the recordMedian yearYears with a value
Hottest day (TXx)43.3 C (109.9 F)193637.0 C (98.5 F)56
Coldest night (TNn)-34.4 C (-29.9 F)1917-22.8 C (-9.0 F)56
Wettest day (Rx1day)177.8 mm (7.0 in)189563.5 mm (2.5 in)63
Wettest five days (Rx5day)207.0 mm (8.1 in)193797.7 mm (3.8 in)63
Longest dry spell (CDD)43 days196620 days63

Hottest day (TXx)

Hottest day (TXx) at Marengo by year The hottest day of the year at Marengo, 1893 to 2014. The record is 43.3 C (109.9 F) in 1936, marked on the chart; the median year is 37.0 C (98.5 F). 2530354045190019201940196019802000Record: 43.3 C (109.9 F) in 1936
The hottest day of the year at Marengo, 1893 to 2014. The record is 43.3 C (109.9 F) in 1936, marked on the chart; the median year is 37.0 C (98.5 F).
Hottest day (TXx) at Marengo by year
YearHottest day (TXx)
1893n/a
1894n/a
1895n/a
189636.7 C (98.1 F)
189737.8 C (100.0 F)
189836.7 C (98.1 F)
189937.2 C (99.0 F)
190035.6 C (96.1 F)
190141.1 C (106.0 F)
190235.6 C (96.1 F)
190337.8 C (100.0 F)
190435.6 C (96.1 F)
190535.0 C (95.0 F)
190635.0 C (95.0 F)
190738.9 C (102.0 F)
190836.7 C (98.1 F)
190935.0 C (95.0 F)
191033.9 C (93.0 F)
191138.3 C (100.9 F)
191236.7 C (98.1 F)
191340.0 C (104.0 F)
191438.9 C (102.0 F)
191535.6 C (96.1 F)
191637.2 C (99.0 F)
191735.6 C (96.1 F)
191837.8 C (100.0 F)
191936.1 C (97.0 F)
192033.9 C (93.0 F)
192138.9 C (102.0 F)
192236.7 C (98.1 F)
192335.6 C (96.1 F)
192436.1 C (97.0 F)
192538.3 C (100.9 F)
192638.9 C (102.0 F)
192736.7 C (98.1 F)
192836.7 C (98.1 F)
192937.2 C (99.0 F)
193042.2 C (108.0 F)
193138.3 C (100.9 F)
193237.2 C (99.0 F)
193338.9 C (102.0 F)
193439.4 C (102.9 F)
193536.7 C (98.1 F)
193643.3 C (109.9 F)
193736.1 C (97.0 F)
193835.0 C (95.0 F)
193939.4 C (102.9 F)
194038.9 C (102.0 F)
194137.8 C (100.0 F)
194237.2 C (99.0 F)
194338.9 C (102.0 F)
194438.3 C (100.9 F)
196336.1 C (97.0 F)
196441.1 C (106.0 F)
196536.7 C (98.1 F)
196642.8 C (109.0 F)
196735.0 C (95.0 F)
196835.0 C (95.0 F)
196927.8 C (82.0 F)
2011n/a
2012n/a
2013n/a
2014n/a

Coldest night (TNn)

Coldest night (TNn) at Marengo by year The coldest night of the year at Marengo, 1893 to 2014. The record is -34.4 C (-29.9 F) in 1917, marked on the chart; the median year is -22.8 C (-9.0 F). -40-30-20-10190019201940196019802000Record: -34.4 C (-29.9 F) in 1917
The coldest night of the year at Marengo, 1893 to 2014. The record is -34.4 C (-29.9 F) in 1917, marked on the chart; the median year is -22.8 C (-9.0 F).
Coldest night (TNn) at Marengo by year
YearColdest night (TNn)
1893n/a
1894n/a
1895n/a
1896-15.6 C (3.9 F)
1897-20.6 C (-5.1 F)
1898-23.9 C (-11.0 F)
1899-33.3 C (-27.9 F)
1900-22.8 C (-9.0 F)
1901-28.3 C (-18.9 F)
1902-18.3 C (-0.9 F)
1903-27.2 C (-17.0 F)
1904-20.6 C (-5.1 F)
1905-20.0 C (-4.0 F)
1906-27.2 C (-17.0 F)
1907-21.1 C (-6.0 F)
1908-14.4 C (6.1 F)
1909-19.4 C (-2.9 F)
1910-28.9 C (-20.0 F)
1911-17.8 C (0.0 F)
1912-33.3 C (-27.9 F)
1913-18.9 C (-2.0 F)
1914-22.8 C (-9.0 F)
1915-20.6 C (-5.1 F)
1916-25.6 C (-14.1 F)
1917-34.4 C (-29.9 F)
1918-32.8 C (-27.0 F)
1919-15.6 C (3.9 F)
1920-22.8 C (-9.0 F)
1921-11.7 C (10.9 F)
1922-18.9 C (-2.0 F)
1923-15.6 C (3.9 F)
1924-17.2 C (1.0 F)
1925-22.8 C (-9.0 F)
1926-15.6 C (3.9 F)
1927-21.7 C (-7.1 F)
1928-23.3 C (-9.9 F)
1929-26.1 C (-15.0 F)
1930-31.1 C (-24.0 F)
1931-19.4 C (-2.9 F)
1932-22.8 C (-9.0 F)
1933-22.8 C (-9.0 F)
1934-17.2 C (1.0 F)
1935-17.8 C (0.0 F)
1936-31.1 C (-24.0 F)
1937-15.6 C (3.9 F)
1938-23.3 C (-9.9 F)
1939-25.6 C (-14.1 F)
1940-29.4 C (-20.9 F)
1941-15.6 C (3.9 F)
1942-29.4 C (-20.9 F)
1943-23.3 C (-9.9 F)
1944-17.8 C (0.0 F)
1963-26.1 C (-15.0 F)
1964-25.6 C (-14.1 F)
1965-26.1 C (-15.0 F)
1966-23.9 C (-11.0 F)
1967-23.9 C (-11.0 F)
1968-12.2 C (10.0 F)
1969-18.9 C (-2.0 F)
2011n/a
2012n/a
2013n/a
2014n/a

Wettest day (Rx1day)

Wettest day (Rx1day) at Marengo by year The wettest day of the year at Marengo, 1893 to 2014. The record is 177.8 mm (7.0 in) in 1895, marked on the chart; the median year is 63.5 mm (2.5 in). 050100150200190019201940196019802000Record: 177.8 mm (7.0 in) in 1895
The wettest day of the year at Marengo, 1893 to 2014. The record is 177.8 mm (7.0 in) in 1895, marked on the chart; the median year is 63.5 mm (2.5 in).
Wettest day (Rx1day) at Marengo by year
YearWettest day (Rx1day)
1893127.0 mm (5.0 in)
189476.2 mm (3.0 in)
1895177.8 mm (7.0 in)
189654.9 mm (2.2 in)
189763.5 mm (2.5 in)
189880.5 mm (3.2 in)
189955.4 mm (2.2 in)
190067.3 mm (2.6 in)
190155.6 mm (2.2 in)
190271.1 mm (2.8 in)
190350.8 mm (2.0 in)
190468.1 mm (2.7 in)
190573.2 mm (2.9 in)
190654.6 mm (2.1 in)
190778.0 mm (3.1 in)
190885.3 mm (3.4 in)
190980.5 mm (3.2 in)
1910101.6 mm (4.0 in)
191154.9 mm (2.2 in)
1912104.9 mm (4.1 in)
191361.0 mm (2.4 in)
191473.7 mm (2.9 in)
191562.7 mm (2.5 in)
191649.5 mm (1.9 in)
191763.5 mm (2.5 in)
191869.9 mm (2.8 in)
191953.3 mm (2.1 in)
192050.8 mm (2.0 in)
192153.3 mm (2.1 in)
192250.8 mm (2.0 in)
192369.9 mm (2.8 in)
192473.7 mm (2.9 in)
192572.4 mm (2.9 in)
192676.2 mm (3.0 in)
192778.2 mm (3.1 in)
192883.8 mm (3.3 in)
192952.1 mm (2.1 in)
193038.1 mm (1.5 in)
193162.2 mm (2.4 in)
193294.0 mm (3.7 in)
193350.8 mm (2.0 in)
193433.5 mm (1.3 in)
1935106.7 mm (4.2 in)
193655.9 mm (2.2 in)
193785.1 mm (3.4 in)
193896.5 mm (3.8 in)
193954.9 mm (2.2 in)
194050.0 mm (2.0 in)
194150.0 mm (2.0 in)
194264.0 mm (2.5 in)
194376.2 mm (3.0 in)
194446.5 mm (1.8 in)
196341.7 mm (1.6 in)
1964125.7 mm (4.9 in)
196574.7 mm (2.9 in)
196650.8 mm (2.0 in)
196754.9 mm (2.2 in)
196844.5 mm (1.8 in)
196944.5 mm (1.8 in)
201111.2 mm (0.4 in)
201242.2 mm (1.7 in)
201377.5 mm (3.1 in)
201417.8 mm (0.7 in)

Wettest five days (Rx5day)

Wettest five days (Rx5day) at Marengo by year The wettest five days of the year at Marengo, 1893 to 2014. The record is 207.0 mm (8.1 in) in 1937, marked on the chart; the median year is 97.7 mm (3.8 in). 0100200300190019201940196019802000Record: 207.0 mm (8.1 in) in 1937
The wettest five days of the year at Marengo, 1893 to 2014. The record is 207.0 mm (8.1 in) in 1937, marked on the chart; the median year is 97.7 mm (3.8 in).
Wettest five days (Rx5day) at Marengo by year
YearWettest five days (Rx5day)
1893177.8 mm (7.0 in)
1894114.3 mm (4.5 in)
1895180.3 mm (7.1 in)
189694.8 mm (3.7 in)
189786.0 mm (3.4 in)
1898107.9 mm (4.2 in)
189979.0 mm (3.1 in)
190072.6 mm (2.9 in)
1901100.3 mm (3.9 in)
1902131.3 mm (5.2 in)
190390.6 mm (3.6 in)
190492.7 mm (3.6 in)
1905105.7 mm (4.2 in)
190697.0 mm (3.8 in)
190799.5 mm (3.9 in)
1908111.0 mm (4.4 in)
190990.7 mm (3.6 in)
1910134.6 mm (5.3 in)
191194.5 mm (3.7 in)
1912110.0 mm (4.3 in)
191397.1 mm (3.8 in)
191491.0 mm (3.6 in)
191583.0 mm (3.3 in)
191668.6 mm (2.7 in)
191796.5 mm (3.8 in)
1918128.3 mm (5.1 in)
191997.9 mm (3.9 in)
192085.1 mm (3.4 in)
1921123.9 mm (4.9 in)
192288.1 mm (3.5 in)
192390.0 mm (3.5 in)
1924104.2 mm (4.1 in)
192586.4 mm (3.4 in)
1926107.1 mm (4.2 in)
1927145.6 mm (5.7 in)
1928109.3 mm (4.3 in)
1929113.1 mm (4.5 in)
193094.0 mm (3.7 in)
193162.2 mm (2.4 in)
1932105.5 mm (4.2 in)
1933118.2 mm (4.7 in)
193462.3 mm (2.5 in)
1935132.1 mm (5.2 in)
1936127.0 mm (5.0 in)
1937207.0 mm (8.1 in)
1938106.7 mm (4.2 in)
1939118.2 mm (4.7 in)
194097.7 mm (3.8 in)
194189.6 mm (3.5 in)
194288.9 mm (3.5 in)
1943102.9 mm (4.1 in)
194482.1 mm (3.2 in)
196344.2 mm (1.7 in)
1964202.4 mm (8.0 in)
1965154.2 mm (6.1 in)
1966128.4 mm (5.1 in)
196754.9 mm (2.2 in)
196885.2 mm (3.4 in)
1969106.4 mm (4.2 in)
201122.4 mm (0.9 in)
201268.2 mm (2.7 in)
201397.6 mm (3.8 in)
20145.6 mm (0.22 in)

Longest dry spell (CDD)

Longest dry spell (CDD) at Marengo by year The longest dry spell of the year at Marengo, 1893 to 2014. The record is 43 days in 1966, marked on the chart; the median year is 20 days. 01020304050190019201940196019802000Record: 43 days in 1966
The longest dry spell of the year at Marengo, 1893 to 2014. The record is 43 days in 1966, marked on the chart; the median year is 20 days.
Longest dry spell (CDD) at Marengo by year
YearLongest dry spell (CDD)
189315 days
189423 days
189510 days
189617 days
189728 days
189816 days
189923 days
190016 days
190126 days
190213 days
190325 days
190422 days
190512 days
190612 days
190718 days
190833 days
190913 days
191014 days
191116 days
191217 days
191316 days
191418 days
191524 days
191619 days
191714 days
191816 days
191920 days
192027 days
192119 days
192216 days
192326 days
192424 days
192523 days
192616 days
192721 days
192815 days
192922 days
193027 days
193118 days
193220 days
193324 days
193427 days
193519 days
193623 days
193724 days
193830 days
193923 days
194029 days
194117 days
194223 days
194327 days
194433 days
196327 days
196419 days
196520 days
196643 days
196726 days
196823 days
196915 days
20119 days
201215 days
201313 days
20148 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

35 years with a frost

Across 35 years with a frost, the median last spring frost at Marengo falls on 28 April and the median first autumn frost on 8 October, which leaves a median of 161 days between them.

Fitted over all years, the growing season changes by -5.4 days per decade at this station.

Frost dates and growing season at Marengo
MeasureMedian, all yearsEarliest periodRecent period (1902 to 1965)Recent against earliestFitted trend
Last spring frost28 Apriln/a1 Mayn/a+1.3 days per decade
First autumn frost8 Octobern/a7 Octobern/a-4.1 days per decade
Growing days161 daysn/a158 daysn/a-5.4 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

39 years, 1894 to 1966

A day with at least 65.4 mm (2.6 in) of rain is expected about once in 2 years. A day with at least 127.5 mm (5.0 in) of rain is expected about once in 100 years.

Rainfall return levels at Marengo: the daily rain expected about once in a given number of years
Expected about once inA day with at leastNote
2 years65.4 mm (2.6 in)
5 years82.7 mm (3.3 in)
10 years93.8 mm (3.7 in)
25 years107.6 mm (4.2 in)
50 years117.7 mm (4.6 in)Longer than the 39 years of record
100 years127.5 mm (5.0 in)Longer than the 39 years of record

The levels come from a generalised extreme value (GEV) distribution fitted by L-moments to the wettest-day total of each year, 39 years of values from 1894 to 1966.

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: 125.7 mm (4.9 in) in 1964; 106.7 mm (4.2 in) in 1935; 101.6 mm (4.0 in) in 1910.

Download the Data

  • Data for Marengo standing records by year: CSV or JSON. Field meanings are on the data page.
  • Data for Marengo 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 2026-10-15 (15 October 2026). Records are computed by this site and are not official.

Data as of . Last revised (2025-12-31).