Earliest and Latest Days of 80° F in Portland

This is a list of the earliest and latest days in the year with a high temperature of at least 80 °F in Portland, Maine history. It is based on NOAA data from the years 1871–2024.

Also see:

Earliest 80 degree day in Portland?

The earliest in the year that Portland, Maine had a high temperature of at least 80 °F is March 22 which happened in 2012.

Latest 80 degree day in Portland?

The latest in the year that Portland, Maine had a high temperature of at least 80 °F is October 31 which happened in 1946.

Earliest Days ≥ 80 °F

Date	Year	Temperature
March 22	2012	82 °F
March 29	1946	86 °F
March 29	1945	83 °F
March 31	1998	88 °F
April 7	2010	85 °F
April 7	1929	80 °F
April 12	1945	80 °F
April 15	2003	83 °F
April 16	2017	86 °F
April 17	2012	83 °F
April 17	2002	80 °F
April 20	2005	85 °F
April 20	1976	81 °F
April 20	1927	89 °F
April 21	1957	85 °F
April 21	1923	82 °F
April 22	2001	81 °F
April 22	1977	82 °F
April 22	1974	81 °F
April 23	2007	81 °F

Latest Days ≥ 80 °F

Date	Year	Temperature
October 31	1946	80 °F
October 28	2023	80 °F
October 27	1963	81 °F
October 24	1963	81 °F
October 23	1947	83 °F
October 22	1979	81 °F
October 19	1963	81 °F
October 19	1947	80 °F
October 18	1947	82 °F
October 17	1968	81 °F
October 17	1947	84 °F
October 17	1938	83 °F
October 17	1908	80 °F
October 16	1968	81 °F
October 16	1963	84 °F
October 16	1897	84 °F
October 15	1897	84 °F
October 13	1954	84 °F
October 13	1930	82 °F
October 12	1995	80 °F
October 12	1954	81 °F
October 12	1938	81 °F