Records for Rapid City Area, South Dakota (RAPthr) on 09-18
Record Highs
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1: 97°F (1998)
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2: 96°F (2021)
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3: 96°F (2004)
Record Lows
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1: 24°F (1991)
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2: 32°F (1992)
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3: 32°F (1965)
Lowest Highs
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1: 64°F (2000)
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2: 58°F (1984)
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3: 58°F (1976)
Highest Lows
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1: 41°F (1942)
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2: 44°F (2010)
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3: 45°F (1945)
Highest September temperature:
104°F on 09-02-1960.
Lowest September temperature:
18°F on 09-24-1985.
Average temperature is 61.5°F
Average high is 73.1°F
Average low is 50°F
Temperature data from 1942 to 2022.
Record Precipitation
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1: 0.86" (1946)
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2: 0.71" (1942)
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3: 0.59" (1945)
Precipitation data from 1942 to 2022.