Boston, MA: records

4 October 2026: The hottest day on record in Boston, MA: 104°F on Tuesday 4 July 1911.

All-time records

The coldest night on record in Boston, MA: a low of -18°F on Friday 9 February 1934.
The wettest day on record in Boston, MA: 7.06 in on Friday 19 August 1955.
The warmest night on record in Boston, MA: a low of 83°F on Sunday 21 July 2019 and Saturday 2 August 1975.
The coldest day on record in Boston, MA: a high of 2°F on Sunday 30 December 1917.

Month	Highest	Lowest	Wettest day
January	74°F 12 January 2020	-13°F 24 January 1882	2.86 in 10 January 1881
February	73°F 24 February 2017	-18°F 9 February 1934	4.45 in 12 February 1886
March	89°F 31 March 1998	-8°F 6 March 1872	3.49 in 18 March 1968
April	94°F 18 April 1976	11°F 5 April 1874	4.29 in 1 April 2004
May	97°F 26 May 1880	31°F 3 May 1882	4.47 in 16 May 1954
June	102°F 24 June 2025	41°F 1 June 1945	5.69 in 13 June 1998
July	104°F 4 July 1911	50°F 1 July 1988, 6 July 1879	6.04 in 9 July 1921
August	102°F 2 August 1975	46°F 25 August 1940	7.06 in 19 August 1955
September	102°F 7 September 1881	34°F 29 September 1914, 26 September 1879	5.63 in 11 September 1954, 16 September 1933
October	90°F 7 October 1963, 12 October 1954, 1 October 1881	25°F 27 October 1936, 26 October 1879	6.11 in 20 October 1996
November	83°F 2 November 1950	-2°F 30 November 1875	3.85 in 20 November 1876
December	76°F 7 December 1998	-17°F 29 December 1933	4.21 in 12 December 1992

The longest run of days with a high of 90°F or above in Boston, MA: 9 days, from Wednesday 3 July to Thursday 11 July 1912.
The longest run of days with a high of 32°F or below in Boston, MA: 16 days, from Thursday 19 January to Friday 3 February 1961.
The wettest month on record in Boston, MA: August 1955, with 17.09 in of precipitation.
The driest month on record in Boston, MA: June 1999, with a trace of precipitation (shared with 1 other month).
The wettest year on record in Boston, MA: 1878, with 65.53 in of precipitation.
The driest year on record in Boston, MA: 1965, with 23.71 in of precipitation.

New daily records set in Boston, MA by decade since the 1900s: the most record highs, 110, came in the 1910s; the most record lows, 50, in the 1900s.

Every decade as a table

Decade	Record highs	Record lows	Years in the record
1870s	0	0	8
1880s	0	0	10
1890s	0	0	10
1900s	78	50	10
1910s	110	40	10
1920s	88	29	10
1930s	73	28	10
1940s	66	21	10
1950s	51	14	10
1960s	19	12	10
1970s	36	7	10
1980s	35	9	10
1990s	44	2	10
2000s	26	5	10
2010s	27	5	10
2020s	24	3	7