Records for Sterling-Dulles Airport Area, Virginia (IADthr) on 05-20
Record Highs
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1: 93°F (1996)
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2: 90°F (1978)
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3: 90°F (1962)
Record Lows
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1: 36°F (2002)
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2: 37°F (1992)
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3: 41°F (2009)
Lowest Highs
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1: 69°F (2019)
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2: 67°F (2018)
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3: 67°F (1969)
Highest Lows
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1: 57°F (1987)
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2: 58°F (2005)
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3: 61°F (2008)
Highest May temperature:
97°F on 05-29-1969.
Lowest May temperature:
28°F on 05-07-1970.
Average temperature is 64.8°F
Average high is 75°F
Average low is 54.6°F
Temperature data from 1960 to 2022.
Record Precipitation
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1: 1.86" (2005)
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2: 1.44" (1971)
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3: 0.82" (1980)
Precipitation data from 1960 to 2022.