Records for Sterling-Dulles Airport Area, Virginia (IADthr) on 09-17
Record Highs
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1: 97°F (1991)
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2: 92°F (1972)
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3: 90°F (2005)
Record Lows
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1: 35°F (1986)
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2: 36°F (1984)
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3: 39°F (2000)
Lowest Highs
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1: 71°F (2018)
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2: 71°F (1991)
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3: 70°F (2021)
Highest Lows
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1: 64°F (2011)
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2: 65°F (2009)
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3: 65°F (1993)
Highest September temperature:
99°F on 09-02-1980.
Lowest September temperature:
30°F on 09-24-1974.
Average temperature is 68.2°F
Average high is 78.9°F
Average low is 57.6°F
Temperature data from 1960 to 2022.
Record Precipitation
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1: 1.71" (2004)
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2: 1.00" (2018)
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3: 0.90" (1987)
Precipitation data from 1960 to 2022.