Records for Rapid City Area, South Dakota (RAPthr) on 09-20
Record Highs
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1: 93°F (1960)
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2: 91°F (2007)
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3: 91°F (1956)
Record Lows
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1: 29°F (1983)
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2: 30°F (1995)
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3: 32°F (1988)
Lowest Highs
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1: 58°F (2007)
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2: 57°F (2019)
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3: 54°F (1992)
Highest Lows
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1: 45°F (1995)
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2: 50°F (1983)
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3: 54°F (1998)
Highest September temperature:
104°F on 09-02-1960.
Lowest September temperature:
18°F on 09-24-1985.
Average temperature is 60.6°F
Average high is 72°F
Average low is 49.1°F
Temperature data from 1942 to 2022.
Record Precipitation
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1: 1.83" (1955)
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2: 1.36" (1950)
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3: 1.18" (1989)
Precipitation data from 1942 to 2022.