Earliest and Latest Days of 70° F in Boston

This is a list of the earliest and latest days in the year with a high temperature of at least 70 °F in Boston, Massachusetts history. It is based on NOAA data from the years 1893–2024.

Also see:

Earliest 70 degree day in Boston?

The earliest in the year that Boston, Massachusetts had a high temperature of at least 70 °F is January 11 which happened in 2020.

Latest 70 degree day in Boston?

The latest in the year that Boston, Massachusetts had a high temperature of at least 70 °F is December 29 which happened in 1984.

Earliest Days ≥ 70 °F

Date	Year	Temperature
January 11	2020	70 °F
January 12	2020	74 °F
January 26	1950	72 °F
February 20	2018	70 °F
February 21	2018	72 °F
February 24	2017	73 °F
February 24	1985	70 °F
March 4	1974	70 °F
March 6	1894	70 °F
March 9	2020	72 °F
March 9	2016	77 °F
March 9	2000	72 °F
March 10	1977	70 °F
March 11	2021	74 °F
March 12	2012	71 °F
March 13	2012	71 °F
March 13	1990	73 °F
March 13	1946	73 °F
March 14	1946	76 °F
March 15	1990	72 °F
March 15	1945	72 °F

Latest Days ≥ 70 °F

Date	Year	Temperature
December 29	1984	73 °F
December 9	1966	70 °F
December 7	1998	76 °F
December 6	2001	72 °F
December 6	1982	70 °F
December 4	1982	70 °F
December 1	2001	71 °F
November 28	1990	74 °F
November 27	1896	72 °F
November 25	1979	70 °F
November 24	1979	70 °F
November 24	1931	72 °F
November 23	1999	70 °F
November 23	1931	77 °F
November 23	1913	71 °F
November 22	1931	74 °F
November 22	1930	71 °F
November 21	1953	70 °F
November 21	1931	74 °F
November 20	1991	73 °F
November 20	1985	73 °F
November 20	1953	74 °F
November 20	1942	70 °F
November 20	1941	71 °F
November 20	1913	71 °F