All-time weather records — Union, SC

Record high
108.0°F
July 29, 1952
Record low
-0.9°F
January 21, 1985
Wettest day
7.33 in
October 12, 1990

Climate change signal in Union

10.4%

of Union's all-time daily heat records were set in the last decade (38 of 366 records since 2015).

4.4%

of all-time daily cold records were set in the last decade (16 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 #
1940s
2
1
1950s
97
68
1960s
55
102
1970s
59
66
1980s
40
59
1990s
22
28
2000s
37
19
2010s
42
14
2020s
12
9

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 1949, the latest in 2026. Period of observation: 1949-2026.

Records by month

Month Hottest day Coldest day Wettest day
January 82.0°F — Jan 30, 2002 -0.9°F — Jan 21, 1985 4.03 in — Jan 15, 1995
February 82.9°F — Feb 27, 1977 3.0°F — Feb 1, 1966 2.44 in — Feb 11, 1981
March 90.0°F — Mar 24, 1995 9.0°F — Mar 6, 1960 3.15 in — Mar 3, 1971
April 95.0°F — Apr 24, 1980 19.9°F — Apr 8, 2007 3.34 in — Apr 21, 1992
May 98.1°F — May 28, 1962 28.9°F — May 8, 1989 4.92 in — May 29, 2010
June 106.0°F — Jun 28, 1954 39.9°F — Jun 1, 1972 3.79 in — Jun 22, 1995
July 108.0°F — Jul 29, 1952 50.0°F — Jul 7, 1951 5.55 in — Jul 24, 1997
August 107.1°F — Aug 18, 1954 46.0°F — Aug 7, 1957 6.60 in — Aug 12, 1991
September 102.0°F — Sep 7, 1954 35.1°F — Sep 30, 1967 6.40 in — Sep 27, 2024
October 100.0°F — Oct 6, 1954 18.0°F — Oct 30, 1965 7.33 in — Oct 12, 1990
November 87.1°F — Nov 3, 1961 10.0°F — Nov 20, 1951 5.04 in — Nov 21, 1985
December 80.1°F — Dec 1, 1970 0.0°F — Dec 13, 1962 4.30 in — Dec 23, 2013

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