Records for Portland Area, Maine (PWMthr) on 05-20
Record Highs
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1: 86°F (1959)
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2: 82°F (2010)
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3: 81°F (1982)
Record Lows
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1: 32°F (2002)
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2: 32°F (1955)
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3: 33°F (1944)
Lowest Highs
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1: 60°F (1982)
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2: 57°F (1959)
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3: 56°F (1986)
Highest Lows
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1: 46°F (1968)
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2: 46°F (1957)
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3: 48°F (1948)
Highest May temperature:
94°F on 05-31-1987.
Lowest May temperature:
23°F on 05-09-1956.
Average temperature is 56°F
Average high is 65.3°F
Average low is 46.8°F
Temperature data from 1874 to 2022.
Record Precipitation
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1: 2.31" (1928)
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2: 1.60" (1884)
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3: 1.29" (1901)
Precipitation data from 1871 to 2022.