Records for Portland Area, Maine (PWMthr) on 05-15
Record Highs
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1: 85°F (2004)
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2: 80°F (1957)
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3: 79°F (1951)
Record Lows
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1: 27°F (1947)
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2: 29°F (1965)
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3: 33°F (1996)
Lowest Highs
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1: 52°F (2012)
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2: 52°F (1974)
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3: 51°F (2022)
Highest Lows
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1: 46°F (1967)
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2: 48°F (1995)
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3: 48°F (1978)
Highest May temperature:
94°F on 05-31-1987.
Lowest May temperature:
23°F on 05-09-1956.
Average temperature is 54.6°F
Average high is 63.9°F
Average low is 45.2°F
Temperature data from 1874 to 2022.
Record Precipitation
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1: 1.78" (1938)
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2: 1.32" (1978)
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3: 1.21" (1930)
Precipitation data from 1871 to 2022.