All-time weather records — Merrill, WI

Record high
109.9°F
July 13, 1936
Record low
-47.9°F
January 12, 1909
Wettest day
10.76 in
November 16, 1957

Climate change signal in Merrill

8.5%

of Merrill's all-time daily heat records were set in the last decade (31 of 366 records since 2015).

1.4%

of all-time daily cold records were set in the last decade (5 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
22
24
1910s
52
33
1920s
40
49
1930s
78
25
1940s
24
23
1950s
26
33
1960s
11
19
1970s
12
73
1980s
17
44
1990s
17
24
2000s
19
10
2010s
22
7
2020s
26
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 1905, the latest in 2026. Period of observation: 1905-2026.

Records by month

Month Hottest day Coldest day Wettest day
January 57.0°F — Jan 23, 1942 -47.9°F — Jan 12, 1909 1.66 in — Jan 5, 1939
February 64.9°F — Feb 28, 2024 -42.0°F — Feb 5, 1907 2.05 in — Feb 12, 1965
March 86.0°F — Mar 27, 1910 -35.0°F — Mar 1, 1962 2.18 in — Mar 16, 2016
April 91.9°F — Apr 28, 1952 -5.1°F — Apr 1, 1924 2.21 in — Apr 30, 1984
May 104.0°F — May 30, 1934 15.1°F — May 6, 1950 2.45 in — May 6, 1936
June 104.0°F — Jun 23, 1934 28.0°F — Jun 4, 1945 4.35 in — Jun 24, 1946
July 109.9°F — Jul 13, 1936 33.1°F — Jul 4, 1972 5.90 in — Jul 23, 1912
August 100.9°F — Aug 15, 1936 30.0°F — Aug 30, 1915 3.74 in — Aug 24, 1962
September 97.0°F — Sep 8, 1933 18.0°F — Sep 22, 1974 4.64 in — Sep 5, 2018
October 89.1°F — Oct 4, 1905 3.9°F — Oct 30, 1925 3.00 in — Oct 6, 1911
November 75.0°F — Nov 1, 1909 -15.0°F — Nov 28, 1976 10.76 in — Nov 16, 1957
December 62.1°F — Dec 1, 1909 -31.0°F — Dec 19, 1983 2.00 in — Dec 4, 1990

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