Records for Portland Area, Maine (PWMthr) on 05-17
Record Highs
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1: 90°F (1977)
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2: 87°F (1969)
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3: 84°F (1974)
Record Lows
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1: 27°F (1957)
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2: 31°F (1959)
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3: 33°F (1963)
Lowest Highs
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1: 54°F (2022)
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2: 54°F (1977)
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3: 53°F (1987)
Highest Lows
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1: 48°F (1995)
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2: 48°F (1968)
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3: 49°F (2007)
Highest May temperature:
94°F on 05-31-1987.
Lowest May temperature:
23°F on 05-09-1956.
Average temperature is 55.2°F
Average high is 64.5°F
Average low is 45.9°F
Temperature data from 1874 to 2022.
Record Precipitation
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1: 4.78" (1916)
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2: 2.07" (1948)
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3: 1.90" (1970)
Precipitation data from 1871 to 2022.