Records for Rapid City Area, South Dakota (RAPthr) on 09-30
Record Highs
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1: 93°F (1989)
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2: 93°F (1967)
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3: 92°F (1963)
Record Lows
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1: 25°F (1985)
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2: 25°F (1974)
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3: 25°F (1959)
Lowest Highs
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1: 59°F (1963)
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2: 55°F (1989)
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3: 55°F (1957)
Highest Lows
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1: 42°F (1985)
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2: 44°F (2018)
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3: 45°F (1982)
Highest September temperature:
104°F on 09-02-1960.
Lowest September temperature:
18°F on 09-24-1985.
Average temperature is 55.6°F
Average high is 66.4°F
Average low is 44.7°F
Temperature data from 1942 to 2022.
Record Precipitation
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1: 0.56" (2014)
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2: 0.42" (1977)
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3: 0.41" (1962)
Precipitation data from 1942 to 2022.