Earliest and Latest Days at or Below 32° F in Portland

This is a list of the earliest and latest days in a winter season where the low temperature fell to at least 32 °F in Portland, Maine history. It is based on NOAA data from the years 1871–2024.

Earliest freezing temperature in Portland?

The earliest in a winter season that Portland, Maine has recorded a low temperature of 32 °F or below is September 14 which happened in 1963.

Latest freezing temperature in Portland?

The latest in a winter season that Portland, Maine has recorded a low temperature of 32 °F or below is May 31 which happened in 1961.

Earliest Days ≤ 32 °F

Date	Year	Temperature
September 14	1963	28 °F
September 15	1963	29 °F
September 16	1964	28 °F
September 17	1948	30 °F
September 18	1961	32 °F
September 18	1950	32 °F
September 19	1964	31 °F
September 19	1959	32 °F
September 19	1956	31 °F
September 20	1979	29 °F
September 20	1964	27 °F
September 20	1941	31 °F
September 21	1964	30 °F
September 21	1962	30 °F
September 21	1956	30 °F
September 22	1973	30 °F
September 22	1962	27 °F
September 23	1955	31 °F
September 23	1904	32 °F
September 24	1963	32 °F
September 24	1953	28 °F
September 24	1950	31 °F
September 24	1947	31 °F

Latest Days ≤ 32 °F

Date	Year	Temperature
May 31	1961	31 °F
May 27	1969	32 °F
May 26	1972	31 °F
May 26	1956	32 °F
May 26	1949	30 °F
May 25	1963	32 °F
May 25	1956	27 °F
May 24	1963	30 °F
May 24	1956	30 °F
May 20	2002	32 °F
May 20	1955	32 °F
May 19	1956	30 °F
May 19	1951	28 °F
May 19	1944	29 °F
May 18	2023	30 °F
May 18	1981	31 °F
May 18	1959	31 °F
May 18	1951	32 °F
May 17	1959	31 °F
May 17	1957	27 °F