All-time weather records — Grand Lake, CO

Record high
91.9°F
July 15, 1978
Record low
-43.1°F
January 13, 1963
Wettest day
3.20 in
September 28, 1985

Climate change signal in Grand Lake

10.4%

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

2.7%

of all-time daily cold records were set in the last decade (10 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 #
1900s
·
·
1910s
·
·
1920s
·
·
1930s
6
·
1940s
39
48
1950s
25
98
1960s
24
67
1970s
28
66
1980s
53
34
1990s
67
23
2000s
72
9
2010s
22
19
2020s
30
2

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 1939, the latest in 2026. Period of observation: 1907-2026.

Records by month

Month Hottest day Coldest day Wettest day
January 57.0°F — Jan 1, 1999 -43.1°F — Jan 13, 1963 1.01 in — Jan 31, 1914
February 55.9°F — Feb 11, 1962 -41.1°F — Feb 18, 1942 1.91 in — Feb 20, 1986
March 72.0°F — Mar 28, 1990 -36.0°F — Mar 3, 1943 1.45 in — Mar 19, 2003
April 73.9°F — Apr 22, 1975 -20.9°F — Apr 4, 1945 2.70 in — Apr 11, 1909
May 82.0°F — May 29, 2003 1.0°F — May 2, 2013 1.97 in — May 7, 1969
June 89.1°F — Jun 24, 1988 15.1°F — Jun 19, 1987 1.50 in — Jun 9, 1984
July 91.9°F — Jul 15, 1978 21.0°F — Jul 2, 1959 1.91 in — Jul 19, 1985
August 91.9°F — Aug 8, 1995 18.0°F — Aug 29, 1978 1.92 in — Aug 20, 1917
September 89.1°F — Sep 6, 1978 7.0°F — Sep 25, 1961 3.20 in — Sep 28, 1985
October 82.0°F — Oct 11, 1944 -15.0°F — Oct 31, 2019 1.59 in — Oct 3, 1969
November 68.0°F — Nov 14, 1999 -27.9°F — Nov 22, 1957 1.00 in — Nov 9, 1985
December 55.0°F — Dec 9, 1939 -35.0°F — Dec 23, 1990 1.50 in — Dec 5, 1913

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