Records for Boston Area, Massachusetts (BOSthr) on 05-21
Record Highs
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1: 93°F (1921)
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2: 92°F (2009)
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3: 91°F (1996)
Record Lows
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1: 41°F (1907)
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2: 42°F (1990)
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3: 42°F (1892)
Lowest Highs
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1: 66°F (1996)
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2: 66°F (1903)
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3: 65°F (1918)
Highest Lows
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1: 45°F (1990)
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2: 46°F (1892)
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3: 48°F (1929)
Highest May temperature:
97°F on 05-26-1880.
Lowest May temperature:
31°F on 05-03-1882.
Average temperature is 59.7°F
Average high is 67.8°F
Average low is 51.6°F
Temperature data from 1872 to 2022.
Record Precipitation
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1: 2.24" (1889)
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2: 1.85" (1954)
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3: 1.28" (1874)
Precipitation data from 1872 to 2022.