All-time weather records — New Boston, IL

Record high
111.0°F
May 24, 1939
Record low
-26.0°F
January 31, 2019
Wettest day
7.47 in
August 17, 1939

Climate change signal in New Boston

30.9%

of New Boston's all-time daily heat records were set in the last decade (113 of 366 records since 2015).

26%

of all-time daily cold records were set in the last decade (95 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 #
1930s
41
4
1940s
55
97
1950s
·
·
1960s
1
·
1970s
·
5
1980s
·
·
1990s
19
34
2000s
80
82
2010s
107
101
2020s
63
43

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 1938, the latest in 2026. Period of observation: 1938-2026.

Records by month

Month Hottest day Coldest day Wettest day
January 64.0°F — Jan 9, 2003 -26.0°F — Jan 31, 2019 1.60 in — Jan 18, 2020
February 75.0°F — Feb 28, 2024 -25.1°F — Feb 1, 2019 1.95 in — Feb 21, 1997
March 84.0°F — Mar 31, 2026 -14.1°F — Mar 1, 2015 4.54 in — Mar 13, 2006
April 88.0°F — Apr 18, 2002 17.1°F — Apr 7, 2018 3.34 in — Apr 24, 1976
May 111.0°F — May 24, 1939 28.0°F — May 3, 2005 5.04 in — May 1, 2003
June 99.0°F — Jun 24, 1938 30.9°F — Jun 2, 2001 4.20 in — Jun 22, 2007
July 105.1°F — Jul 28, 2011 48.9°F — Jul 11, 1945 4.47 in — Jul 5, 1948
August 102.9°F — Aug 25, 2023 43.0°F — Aug 29, 1997 7.47 in — Aug 17, 1939
September 99.0°F — Sep 2, 2011 30.0°F — Sep 28, 1942 4.25 in — Sep 21, 1947
October 91.9°F — Oct 1, 2023 21.0°F — Oct 26, 1942 2.78 in — Oct 13, 1966
November 82.0°F — Nov 2, 2016 6.1°F — Nov 30, 1947 2.06 in — Nov 1, 1984
December 73.0°F — Dec 16, 2021 -18.0°F — Dec 26, 2000 3.60 in — Dec 27, 1942

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