All-time weather records — Marlborough, MA

Record high
105.1°F
July 23, 2011
Record low
-22.0°F
January 22, 1984
Wettest day
6.01 in
October 21, 1996

Climate change signal in Marlborough

6.6%

of Marlborough's all-time daily heat records were set in the last decade (24 of 366 records since 2015).

3%

of all-time daily cold records were set in the last decade (11 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 #
1960s
40
80
1970s
47
111
1980s
78
85
1990s
67
36
2000s
73
27
2010s
61
27

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 1963, the latest in 2017. Period of observation: 1963-2018.

Records by month

Month Hottest day Coldest day Wettest day
January 72.0°F — Jan 7, 2007 -22.0°F — Jan 22, 1984 2.70 in — Jan 25, 1979
February 77.0°F — Feb 21, 1974 -16.1°F — Feb 5, 1996 2.45 in — Feb 26, 2010
March 88.0°F — Mar 29, 1998 -8.0°F — Mar 19, 1967 2.68 in — Mar 30, 2014
April 95.0°F — Apr 18, 2002 12.0°F — Apr 2, 1964 2.83 in — Apr 2, 2004
May 99.0°F — May 11, 1979 25.0°F — May 3, 1966 2.73 in — May 10, 1977
June 99.0°F — Jun 11, 2008 32.0°F — Jun 6, 1964 3.90 in — Jun 14, 1998
July 105.1°F — Jul 23, 2011 39.9°F — Jul 1, 1988 3.70 in — Jul 14, 1996
August 100.0°F — Aug 13, 2016 37.0°F — Aug 22, 1982 5.17 in — Aug 20, 1991
September 100.0°F — Sep 9, 2015 26.1°F — Sep 29, 2000 5.18 in — Sep 7, 2008
October 89.1°F — Oct 7, 1963 15.1°F — Oct 21, 1972 6.01 in — Oct 21, 1996
November 80.1°F — Nov 5, 1987 3.9°F — Nov 24, 1989 3.08 in — Nov 7, 1963
December 77.0°F — Dec 8, 1998 -14.1°F — Dec 26, 1980 3.75 in — Dec 26, 1969

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