Records for Sterling-Dulles Airport Area, Virginia (IADthr) on 09-16
Record Highs
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1: 97°F (1991)
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2: 94°F (1998)
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3: 94°F (1970)
Record Lows
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1: 37°F (1984)
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2: 40°F (1985)
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3: 42°F (2011)
Lowest Highs
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1: 69°F (2021)
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2: 69°F (2005)
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3: 69°F (1991)
Highest Lows
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1: 62°F (2011)
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2: 62°F (1996)
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3: 64°F (1999)
Highest September temperature:
99°F on 09-02-1980.
Lowest September temperature:
30°F on 09-24-1974.
Average temperature is 68.6°F
Average high is 79.2°F
Average low is 58°F
Temperature data from 1960 to 2022.
Record Precipitation
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1: 2.05" (1999)
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2: 0.99" (1996)
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3: 0.82" (1989)
Precipitation data from 1960 to 2022.