All-time weather records — Union, IL

Record high
109.0°F
July 14, 1936
Record low
-29.0°F
January 11, 1979
Wettest day
9.02 in
September 7, 1894

Climate change signal in Union

5.2%

of Union's all-time daily heat records were set in the last decade (19 of 366 records since 2015).

1.9%

of all-time daily cold records were set in the last decade (7 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
15
32
1900s
17
29
1910s
30
25
1920s
30
35
1930s
64
22
1940s
40
36
1950s
22
25
1960s
15
53
1970s
20
35
1980s
42
35
1990s
21
20
2000s
11
7
2010s
39
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 1893, the latest in 2018. Period of observation: 1893-2018.

Records by month

Month Hottest day Coldest day Wettest day
January 62.1°F — Jan 24, 1967 -29.0°F — Jan 11, 1979 2.96 in — Jan 24, 1938
February 73.0°F — Feb 25, 1932 -27.0°F — Feb 13, 1905 1.40 in — Feb 2, 2011
March 84.0°F — Mar 30, 1986 -16.1°F — Mar 8, 1943 2.10 in — Mar 19, 1948
April 93.9°F — Apr 30, 1926 6.1°F — Apr 7, 1982 3.95 in — Apr 18, 2013
May 107.1°F — May 31, 1934 12.9°F — May 13, 1995 3.35 in — May 13, 2010
June 107.1°F — Jun 1, 1934 28.9°F — Jun 11, 1972 5.15 in — Jun 13, 1999
July 109.0°F — Jul 14, 1936 39.0°F — Jul 5, 1972 4.07 in — Jul 2, 1978
August 107.1°F — Aug 5, 1918 37.0°F — Aug 30, 1915 8.20 in — Aug 22, 2002
September 102.9°F — Sep 8, 1922 24.1°F — Sep 30, 1899 9.02 in — Sep 7, 1894
October 90.0°F — Oct 1, 1971 8.1°F — Oct 28, 1925 3.20 in — Oct 10, 1954
November 80.1°F — Nov 1, 1933 -17.0°F — Nov 30, 1947 2.87 in — Nov 3, 1935
December 66.9°F — Dec 4, 2012 -26.0°F — Dec 27, 1950 2.32 in — Dec 5, 1909

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