Earliest and Latest Days of 70° F in Portland

This is a list of the earliest and latest days in the year with a high temperature of at least 70 °F in Portland, Maine history. It is based on NOAA data from the years 1871–2024.

Also see:

Earliest 70 degree day in Portland?

The earliest in the year that Portland, Maine had a high temperature of at least 70 °F is March 9 which happened in 2020.

Latest 70 degree day in Portland?

The latest in the year that Portland, Maine had a high temperature of at least 70 °F is December 7 which happened in 1998.

Earliest Days ≥ 70 °F

Date	Year	Temperature
March 9	2020	70 °F
March 14	1946	70 °F
March 18	2012	70 °F
March 19	2012	70 °F
March 19	1894	71 °F
March 20	2010	70 °F
March 20	1903	78 °F
March 21	2012	79 °F
March 21	1921	79 °F
March 22	2012	82 °F
March 22	1948	70 °F
March 23	2012	70 °F
March 25	1910	74 °F
March 26	1986	74 °F
March 26	1945	74 °F
March 26	1922	70 °F
March 27	1998	74 °F
March 28	1998	75 °F
March 28	1989	74 °F
March 29	1998	72 °F
March 29	1981	77 °F
March 29	1946	86 °F
March 29	1945	83 °F
March 29	1910	71 °F

Latest Days ≥ 70 °F

Date	Year	Temperature
December 7	1998	71 °F
December 6	2001	71 °F
November 23	1999	70 °F
November 22	1931	73 °F
November 20	1991	71 °F
November 20	1953	71 °F
November 20	1941	71 °F
November 20	1913	70 °F
November 19	1953	70 °F
November 18	1987	70 °F
November 18	1953	70 °F
November 17	1896	72 °F
November 12	2022	73 °F
November 10	2020	72 °F
November 10	1931	74 °F
November 7	2022	72 °F
November 7	2020	74 °F
November 7	1938	74 °F
November 7	1924	72 °F
November 6	2020	71 °F