Portland, ME: May

31 May 2026: May 2026 averaged 55.5°F in Portland, ME, the warmest May since 2024, 31st warmest of 153.

May 2026

Mean temperature: 55.5°F; Warmest since 2024; 31st warmest of 153
Precipitation: 7.02 in; Wettest since 2006; 8th wettest of 156

A normal May in Portland, ME (1991 to 2020): a mean temperature of 54.4°F, between 52.2°F and 57.5°F in eight years of ten and 3.75 in of precipitation, between 1.15 in and 5.91 in in eight years of ten.

The mean temperature of every May in Portland, ME since 1874: 55.5°F in 2026; the highest is 59.7°F, in 1880.

Normal range, 52.2 to 57.5°F

Every year, ranked, as a table

Every May in Portland, ME from 1871 to 2026, ranked: the mean temperature, the mean high and the mean low from the warmest, the precipitation from the wettest; a year missing more than a tenth of its days is not ranked.

Year	Mean, °F	Rank	High, °F	Rank	Low, °F	Rank	Precipitation, in	Rank	Days missing
2026	55.5	31	65.4	25	45.5	53	7.02	8	0
2025	54.3	66	61.7	95	46.8	24	6.61	11	0
2024	56	16	64.5	38	47.5	8	1.70	129	0
2023	55	39	66.4	18	43.6	102	3.94	58	0
2022	55.7	22	65.1	27	46.3	36	1.12	147	0
2021	55.9	19	65.6	24	46.2	40	2.27	104	0
2020	54.4	62	64.9	30	43.9	96	2.14	111	0
2019	53	88	60.9	108	45	65	4.10	51	0
2018	57.4	6	68	9	46.8	24	0.79	152	0
2017	52.9	89	60.9	108	44.8	70	5.94	19	0
2016	54.7	50	63.8	61	45.6	51	2.04	115	0
2015	59.5	2	71.4	1	47.6	7	2.31	102	0
2014	54.7	50	64	55	45.4	56	3.87	59	0
2013	54.1	71	64	55	44.2	87	4.57	41	0
2012	56.6	10	64.5	38	48.7	4	5.91	20	0
2011	54.6	55	61.7	95	47.4	11	4.28	47	0
2010	57.9	5	69.3	4	46.5	31	1.77	126	0
2009	55.1	38	64.5	38	45.7	48	4.52	42	0
2008	54.2	68	64.8	34	43.5	103	1.09	148	0
2007	55.9	19	66.8	13	45.1	61	2.32	101	0
2006	54.6	55	62.6	80	46.5	31	12.34	1	0
2005	49.3	148	56.6	149	42	129	6.40	13	0
2004	54.2	68	63.6	64	44.8	70	4.69	38	0
2003	52.2	109	60.2	117	44.1	90	3.12	83	0
2002	52.5	100	62	89	42.9	114	4.42	43	0
2001	54.9	44	65.4	25	44.4	79	1.15	144	0
2000	53.2	85	62.4	82	44	93	3.07	84	0
1999	54.4	62	65	28	43.9	96	4.98	32	0
1998	56.8	8	66.7	14	46.8	24	3.83	62	0
1997	51	135	59.9	121	42.2	125	2.41	99	0
1996	52.5	100	62.4	82	42.6	119	3.72	66	0
1995	52.2	109	61.8	92	42.5	121	3.31	76	0
1994	52.3	107	61.2	106	43.4	107	4.87	34	0
1993	54.8	46	64.5	38	45.1	61	1.14	146	0
1992	51.8	119	63	69	40.7	144	1.15	144	0
1991	58.1	4	69.9	2	46.2	40	3.77	65	0
1990	51.7	122	60.8	113	42.7	117	5.23	28	0
1989	55.6	27	64.4	47	46.8	24	8.74	3	0
1988	54.7	50	64.1	52	45.2	59	4.27	48	0
1987	54.6	55	65.7	22	43.4	107	2.62	94	0
1986	53.6	80	62.3	86	44.9	67	2.51	98	0
1985	53.7	78	64	55	43.3	109	2.03	117	0
1984	52.9	89	62.4	82	43.5	103	9.64	2	0
1983	52	117	59.9	121	44.1	90	5.98	18	0
1982	54.6	55	64.5	38	44.7	72	2.91	89	0
1981	55.3	32	65.7	22	44.9	67	2.27	104	0
1980	53.7	78	64.2	50	43.1	111	1.83	124	0
1979	55.2	35	63.4	65	47.1	17	5.15	30	0
1978	52.7	94	62.8	77	42.6	119	4.36	46	0
1977	54.4	62	66.9	12	41.9	130	2.04	115	0
1976	52.3	107	63	69	41.6	133	3.99	56	0
1975	55.6	27	65	28	46.2	40	1.09	148	0
1974	50.6	139	58.7	134	42.4	123	4.20	50	0
1973	51.3	131	58.2	142	44.4	79	6.28	15	0
1972	52.5	100	62.4	82	42.7	117	3.17	81	0
1971	52.7	94	61.5	98	43.9	96	4.09	52	0
1970	55.7	22	64.9	30	46.5	31	3.15	82	0
1969	52.8	92	64.1	52	41.4	135	1.67	130	0
1968	51	135	61.9	91	40.1	148	3.81	63	0
1967	47.2	153	57.9	143	36.6	153	5.34	27	0
1966	50.3	141	60.9	108	39.8	151	1.96	121	0
1965	54.7	50	67	11	42.5	121	0.49	156	0
1964	54.8	46	68.1	7	41.5	134	1.56	134	0
1963	52.5	100	64.7	36	40.3	147	3.52	71	0
1962	51	135	62	89	40.1	148	1.81	125	0
1961	51.1	133	61.5	98	40.6	145	2.97	86	0
1960	54.4	62	64.5	38	44.3	85	6.34	14	0
1959	56.2	12	69.5	3	42.8	115	1.57	133	0
1958	50.9	138	60.8	113	40.9	142	2.05	113	0
1957	54.5	60	66.6	16	42.4	123	2.28	103	0
1956	48.2	150	59.5	125	36.9	152	3.06	85	0
1955	56	16	68.9	5	43.1	111	2.33	100	0
1954	51.2	132	60.2	117	42.2	125	6.73	10	0
1953	53.8	75	63.9	58	43.7	99	3.66	68	0
1952	51.6	124	62.3	86	40.9	142	5.04	31	0
1951	53.9	74	66.5	17	41.3	136	2.67	92	0
1950	52.8	92	64.3	48	41.3	136	1.55	135	0
1949	53.8	75	65.8	21	41.8	132	3.50	72	0
1948	50	143	57.8	144	42.1	128	7.74	4	0
1947	51.4	128	61.5	98	41.3	136	4.37	45	0
1946	51.5	126	62.7	78	40.4	146	3.50	72	0
1945	49.5	147	57.7	145	41.3	136	6.77	9	0
1944	55.7	22	67.7	10	43.7	99	1.00	150	0
1943	52.9	89	62.9	74	42.8	115	6.09	17	0
1942	54.8	46	64.1	52	45.5	53	1.77	126	0
1941	55	39	66.7	14	43.3	109	1.46	137	0
1940	52.6	96	59.5	125	45.7	48	5.51	26	0
1939	53.3	82	61.5	98	45	65	1.52	136	0
1938	52.4	104	60.2	117	44.7	72	4.00	55	0
1937	56.2	12	64.3	48	48.1	6	5.58	25	0
1936	55.2	35	63.9	58	46.5	31	1.41	138	0
1935	53.5	81	61.8	92	45.2	59	1.38	139	0
1934	56.2	12	64.9	30	47.5	8	2.20	108	0
1933	55.3	32	63.4	65	47.1	17	2.22	107	0
1932	55.7	22	64.7	36	46.8	24	0.78	153	0
1931	54.8	46	62.6	80	46.9	22	3.84	61	0
1930	55	39	63	69	47.1	17	4.95	33	0
1929	54.7	50	63.8	61	45.6	51	3.54	70	0
1928	50.5	140	56.6	149	44.5	77	4.61	40	0
1927	50.2	142	56.9	148	43.5	103	3.66	68	0
1926	51.8	119	59.9	121	43.7	99	2.16	110	0
1925	51.8	119	59.6	124	44.1	90	1.24	142	0
1924	51.6	124	58.7	134	44.4	79	4.27	48	0
1923	53.3	82	61.5	98	45.1	61	1.97	120	0
1922	55.8	21	64.5	38	47.1	17	5.72	22	0
1921	54.5	60	63	69	46.1	44	2.06	112	0
1920	51.1	133	58.3	141	44	93	3.23	77	0
1919	54.2	68	61.7	95	46.8	24	5.16	29	0
1918	56.6	10	66	20	47.3	15	1.76	128	0
1917	47.3	152	54.6	153	40	150	3.19	80	0
1916	52.4	104	60.3	116	44.5	77	5.64	23	0
1915	52.2	109	60.9	108	43.5	103	2.05	113	0
1914	55.3	32	64.5	38	46.2	40	2.02	118	0
1913	50	143	57	147	43	113	2.92	88	0
1912	54	73	61.5	98	46.4	35	3.81	63	0
1911	56.8	8	66.2	19	47.4	11	1.37	140	0
1910	52.6	96	59.5	125	45.8	47	1.65	131	0
1909	51.4	128	58.5	137	44.4	79	2.95	87	0
1908	54.3	66	62.3	86	46.3	36	4.76	36	0
1907	48.1	151	55.1	151	41	140	1.99	119	0
1906	51.7	122	59.2	131	44.2	87	4.79	35	0
1905	52.1	113	60.1	120	44.2	87	2.58	97	0
1904	56.1	15	64.8	34	47.4	11	4.75	37	0
1903	53.3	82	61.5	98	45.1	61	0.68	155	0
1902	52.6	96	60.9	108	44.3	85	2.17	109	0
1901	51.5	126	58.4	140	44.7	72	7.17	7	0
1900	49.8	145	58.5	137	41	140	4.09	52	0
1899	54.1	71	62.7	78	45.5	53	0.73	154	0
1898	52.6	96	59.2	131	46	45	2.62	94	0
1897	52.2	109	58.6	136	45.7	48	5.87	21	0
1896	55	39	63.8	61	46.3	36	3.21	79	0
1895	54.6	55	62.9	74	46.3	36	1.59	132	0
1894	52.1	113	59.5	125	44.7	72	7.33	6	0
1893	52.1	113	59.5	125	44.7	72	7.59	5	0
1892	51.4	128	58.5	137	44.4	79	4.41	44	0
1891	49.6	146	57.4	146	41.9	130	3.47	74	0
1890	52.1	113	58.9	133	45.3	58	6.10	16	0
1889	55.2	35	62.9	74	47.5	8	2.65	93	0
1888	48.6	149	55.1	151	42.2	125	3.36	75	0
1887	55.6	27	63.9	58	47.4	11	1.93	122	0
1886	53.2	85	61.1	107	45.4	56	4.07	54	0
1885	55.6	27	64.2	50	47	21	1.91	123	0
1884	53.8	75	61.8	92	45.9	46	6.46	12	0
1883	55	39	63.2	68	46.9	22	2.91	89	0
1882	51.9	118	59.4	130	44.4	79	3.95	57	0
1881	55.7	22	63.3	67	48.2	5	5.64	23	0
1880	59.7	1	68.5	6	50.8	1	1.35	141	0
1879	58.9	3	68.1	7	49.7	2	0.88	151	0
1878	56.9	7	64.5	38	49.3	3	1.16	143	0
1877	56	16	64.9	30	47.2	16	2.24	106	0
1876	53.1	87	61.4	105	44.9	67	4.68	39	0
1875	54.9	44	63	69	46.7	30	2.62	94	0
1874	52.4	104	60.8	113	44	93	3.86	60	0
1873							2.80	91	31
1872							3.23	77	31
1871							3.71	67	31

Warmest, coldest, wettest and driest

Warmest
Year	Mean, °F
1880	59.7
2015	59.5
1879	58.9
1991	58.1
2010	57.9
2018	57.4
1878	56.9
1998	56.8
1911	56.8
2012	56.6
More years share the last value

Coldest
Year	Mean, °F
1967	47.2
1917	47.3
1907	48.1
1956	48.2
1888	48.6
2005	49.3
1945	49.5
1891	49.6
1900	49.8
1948	50
More years share the last value

Wettest
Year	Precipitation, in
2006	12.34
1984	9.64
1989	8.74
1948	7.74
1893	7.59
1894	7.33
1901	7.17
2026	7.02
1945	6.77
1954	6.73

Driest
Year	Precipitation, in
1965	0.49
1903	0.68
1899	0.73
1932	0.78
2018	0.79
1879	0.88
1944	1.00
2008	1.09
1975	1.09
2022	1.12

The hottest, coldest and wettest days

Hottest day: 92°F; 19 May 2026
Coldest night: 36°F; 13 May 2026, 9 May 2026, 8 May 2026
Wettest day: 1.98 in; 14 May 2026

Every month, season and year

Months

Seasons

Years

Portland, ME the day's answers

All-time records

Every answer in words

May 2026 brought 7.02 in of precipitation in Portland, ME, the wettest May since 2006, 8th wettest of 156.
The hottest day of May 2026 in Portland, ME: 92°F on Tuesday 19 May 2026.
The coldest night of May 2026 in Portland, ME: a low of 36°F on Wednesday 13 May 2026, Saturday 9 May 2026 and Friday 8 May 2026.
The wettest day of May 2026 in Portland, ME: 1.98 in on Thursday 14 May 2026.