All-time weather records — Ollie, IA

Record high
113.0°F
July 22, 1901
Record low
-32.1°F
January 31, 2019
Wettest day
5.34 in
June 12, 1946

Climate change signal in Ollie

6.6%

of Ollie's all-time daily heat records were set in the last decade (24 of 366 records since 2015).

6.6%

of all-time daily cold records were set in the last decade (24 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
21
27
1900s
56
49
1910s
23
51
1920s
23
42
1930s
76
27
1940s
20
26
1950s
20
15
1960s
16
20
1970s
14
28
1980s
31
20
1990s
15
22
2000s
15
10
2010s
23
17
2020s
13
12

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 1896, the latest in 2026. Period of observation: 1896-2026.

Records by month

Month Hottest day Coldest day Wettest day
January 70.0°F — Jan 31, 1989 -32.1°F — Jan 31, 2019 1.68 in — Jan 4, 1971
February 87.1°F — Feb 2, 1911 -29.9°F — Feb 13, 1905 1.67 in — Feb 14, 1911
March 91.0°F — Mar 22, 2026 -20.0°F — Mar 1, 1962 2.25 in — Mar 19, 1982
April 93.0°F — Apr 30, 1965 7.0°F — Apr 6, 1982 4.92 in — Apr 18, 2013
May 106.0°F — May 31, 1934 24.1°F — May 4, 1907 3.61 in — May 10, 1996
June 105.1°F — Jun 25, 1988 35.1°F — Jun 9, 1916 5.34 in — Jun 12, 1946
July 113.0°F — Jul 22, 1901 45.0°F — Jul 5, 1972 3.85 in — Jul 26, 1992
August 111.0°F — Aug 8, 1934 39.0°F — Aug 30, 1915 4.75 in — Aug 30, 1965
September 102.9°F — Sep 6, 1899 16.0°F — Sep 22, 1913 3.52 in — Sep 10, 1992
October 95.0°F — Oct 4, 1938 3.0°F — Oct 14, 1916 2.70 in — Oct 6, 2018
November 81.0°F — Nov 2, 1938 -9.0°F — Nov 26, 1898 3.43 in — Nov 17, 1952
December 73.9°F — Dec 16, 2021 -29.9°F — Dec 28, 1924 2.33 in — Dec 14, 2015

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