All-time weather records — Marengo, IA

Record high
111.0°F
August 8, 1934
Record low
-31.0°F
January 31, 2019
Wettest day
6.15 in
June 15, 1982

Climate change signal in Marengo

10.1%

of Marengo's all-time daily heat records were set in the last decade (37 of 366 records since 2015).

6.8%

of all-time daily cold records were set in the last decade (25 of 366 records since 2015).

If records were spread evenly across the station's history, you'd expect roughly 5% per decade. Decade-by-decade, here's where each record-breaking day was set:

Decade Heat records set # Cold records set #
1890s
·
14
1910s
10
26
1920s
25
76
1930s
119
32
1940s
24
7
1950s
27
35
1960s
20
41
1970s
12
31
1980s
27
29
1990s
20
23
2000s
32
17
2010s
26
25
2020s
24
10

Records are the all-time daily extremes that are still standing — each daily record can only be held by one year. The station's earliest hot record was set in 1916, the latest in 2026. Period of observation: 1893-2026.

Records by month

Month Hottest day Coldest day Wettest day
January 66.9°F — Jan 31, 1989 -31.0°F — Jan 31, 2019 1.68 in — Jan 12, 1960
February 77.0°F — Feb 23, 2017 -31.0°F — Feb 4, 1996 2.19 in — Feb 9, 2001
March 91.0°F — Mar 22, 2026 -25.1°F — Mar 1, 1962 2.86 in — Mar 25, 1945
April 93.0°F — Apr 10, 1930 5.0°F — Apr 6, 1982 5.40 in — Apr 18, 2013
May 104.0°F — May 31, 1934 19.0°F — May 24, 1934 5.38 in — May 10, 1996
June 108.0°F — Jun 28, 1934 30.0°F — Jun 12, 2003 6.15 in — Jun 15, 1982
July 109.9°F — Jul 14, 1936 36.0°F — Jul 9, 1895 5.20 in — Jul 24, 1924
August 111.0°F — Aug 8, 1934 39.9°F — Aug 15, 1929 4.30 in — Aug 14, 1986
September 102.9°F — Sep 9, 1933 23.0°F — Sep 28, 1926 4.97 in — Sep 7, 1927
October 97.0°F — Oct 7, 1916 -2.9°F — Oct 29, 1925 3.65 in — Oct 6, 2018
November 81.0°F — Nov 1, 1933 -11.9°F — Nov 26, 1895 3.00 in — Nov 17, 1952
December 73.9°F — Dec 16, 2021 -27.9°F — Dec 28, 1924 1.90 in — Dec 15, 1971

Click a month to see every daily record for that month in Marengo.