Records for Sterling-Dulles Airport Area, Virginia (IADthr) on 09-11
Record Highs
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1: 99°F (1983)
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2: 95°F (1964)
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3: 94°F (2019)
Record Lows
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1: 40°F (1976)
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2: 44°F (1980)
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3: 44°F (1972)
Lowest Highs
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1: 72°F (1971)
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2: 72°F (1964)
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3: 71°F (2020)
Highest Lows
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1: 69°F (2009)
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2: 69°F (2006)
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3: 69°F (1967)
Highest September temperature:
99°F on 09-02-1980.
Lowest September temperature:
30°F on 09-24-1974.
Average temperature is 70.4°F
Average high is 81°F
Average low is 59.9°F
Temperature data from 1960 to 2022.
Record Precipitation
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1: 0.72" (1987)
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2: 0.57" (2022)
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3: 0.57" (1971)
Precipitation data from 1960 to 2022.