Records for Sterling-Dulles Airport Area, Virginia (IADthr) on 09-18
Record Highs
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1: 91°F (1978)
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2: 90°F (1991)
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3: 89°F (2016)
Record Lows
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1: 37°F (1990)
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2: 39°F (1986)
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3: 39°F (1984)
Lowest Highs
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1: 70°F (2016)
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2: 69°F (1998)
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3: 68°F (2018)
Highest Lows
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1: 67°F (1990)
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2: 67°F (1981)
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3: 68°F (1975)
Highest September temperature:
99°F on 09-02-1980.
Lowest September temperature:
30°F on 09-24-1974.
Average temperature is 67.8°F
Average high is 78.5°F
Average low is 57.2°F
Temperature data from 1960 to 2022.
Record Precipitation
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1: 1.76" (2003)
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2: 1.17" (2012)
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3: 0.69" (1997)
Precipitation data from 1960 to 2022.