As of 10:55 EDT

Portland, ME weather in May

83°

Portland, Sunday, 9 August, 10:55

Clear. Feels like 89°. High 92°, low 68°.

Pressure29.85 inHg

Wind2 mph SW

Humidity74%

Visibility6.2 mi

Dew point74°

See detailed hourly forecast

In May, Portland, ME averages a high of 60.1° and a low of 47.2°. About 3.4 inches of precipitation fall over the month (10 wet days). The record high is 87.6° (2017) and the record low 30.7° (1966). Normals are computed over the last 60 years.

Day	High	Low	Chance of precip.	Record high	Record low
1	56.3°	42.8°	33%	67.8° (2010)	33.6° (1978)
2	56.5°	43.7°	37%	82.2° (2018)	33.1° (1974)
3	55.8°	43.7°	37%	79.7° (2001)	35.8° (1961)
4	55.9°	44.1°	45%	75.2° (2001)	34° (1986)
5	56.1°	43.9°	43%	71.8° (2000)	35.4° (1974)
6	57°	44.4°	32%	72.5° (2023)	36° (2020)
7	58.1°	44.1°	32%	74.3° (2015)	30.7° (1966)
8	56.3°	43.9°	32%	75.6° (1964)	35.2° (1992)
9	56.3°	44.1°	45%	79.7° (1979)	34.5° (2020)
10	58.3°	45.1°	40%	80.8° (1979)	34° (2020)
11	58.5°	45.5°	25%	76.5° (2023)	33.8° (1966)
12	59°	45.7°	35%	77.9° (1991)	36.7° (1963)
13	58.1°	45.5°	30%	71.2° (2022)	34.3° (2020)
14	59.7°	45.5°	23%	82° (2022)	36.1° (2019)
15	59.5°	46.8°	35%	75.6° (2004)	39.7° (1965)
16	59.7°	47.1°	42%	76.1° (2023)	38.7° (2019)
17	60.8°	47.8°	28%	80.6° (1977)	39° (1983)
18	59.9°	47.5°	37%	87.6° (2017)	35.8° (2023)
19	59.5°	47.3°	35%	80.4° (2017)	38.5° (2002)
20	62.2°	48.2°	35%	77.2° (1996)	39.4° (2002)
21	63.5°	49.6°	28%	78.6° (2009)	40.3° (1964)
22	62.8°	50.2°	27%	87.6° (2024)	41.2° (1990)
23	62.6°	49.5°	28%	85.6° (2024)	41.2° (2025)
24	61.5°	49.6°	42%	82.6° (2024)	41.5° (1963)
25	62.4°	50°	25%	84.9° (2018)	39.7° (2020)
26	63.1°	50.9°	30%	84.9° (2021)	39.9° (1967)
27	63.5°	50.4°	25%	77.7° (2025)	40.3° (1992)
28	65.1°	51.1°	33%	85.5° (2023)	43.7° (2009)
29	64.6°	51.8°	33%	82.6° (2018)	43.3° (2021)
30	65.1°	52.3°	42%	81.9° (2022)	44.1° (2019)
31	65.7°	52.5°	35%	85.1° (1987)	41° (1961)