All-time weather records — Sinclair, WY

Record high
99.0°F
June 11, 2000
Record low
-36.0°F
January 4, 1973
Wettest day
10.01 in
January 2, 1967

Climate change signal in Sinclair

30.3%

of Sinclair's all-time daily heat records were set in the last decade (111 of 366 records since 2015).

10.4%

of all-time daily cold records were set in the last decade (38 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 #
1950s
23
53
1960s
22
69
1970s
9
55
1980s
36
47
1990s
69
46
2000s
70
46
2010s
61
31
2020s
76
19

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 1952, the latest in 2026. Period of observation: 1951-2026.

Records by month

Month Hottest day Coldest day Wettest day
January 55.9°F — Jan 11, 1953 -36.0°F — Jan 4, 1973 10.01 in — Jan 2, 1967
February 57.9°F — Feb 6, 2026 -36.0°F — Feb 2, 2011 1.24 in — Feb 22, 2023
March 78.1°F — Mar 25, 2026 -23.8°F — Mar 10, 2022 1.08 in — Mar 3, 1963
April 79.0°F — Apr 24, 2012 -11.0°F — Apr 1, 1970 1.15 in — Apr 6, 1993
May 88.0°F — May 31, 2002 10.2°F — May 2, 2013 1.66 in — May 17, 2000
June 99.0°F — Jun 11, 2000 21.0°F — Jun 3, 1951 1.04 in — Jun 4, 1972
July 98.1°F — Jul 11, 1954 32.0°F — Jul 7, 1993 1.60 in — Jul 20, 1974
August 98.1°F — Aug 2, 2000 28.0°F — Aug 31, 1962 1.27 in — Aug 18, 1977
September 95.0°F — Sep 4, 1998 8.1°F — Sep 30, 1985 2.06 in — Sep 16, 1965
October 82.0°F — Oct 2, 2025 -19.8°F — Oct 30, 2019 1.44 in — Oct 15, 1980
November 70.0°F — Nov 6, 1999 -23.1°F — Nov 2, 1991 0.93 in — Nov 1, 2011
December 60.1°F — Dec 2, 2021 -35.0°F — Dec 20, 1990 0.72 in — Dec 20, 2010

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