Records for Rapid City Area, South Dakota (RAPthr) on 08-21
Record Highs
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1: 101°F (1947)
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2: 99°F (2010)
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3: 99°F (1962)
Record Lows
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1: 43°F (2021)
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2: 44°F (2016)
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3: 44°F (1966)
Lowest Highs
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1: 67°F (1947)
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2: 66°F (1988)
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3: 66°F (1983)
Highest Lows
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1: 60°F (1964)
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2: 64°F (1966)
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3: 66°F (2018)
Highest August temperature:
107°F on 08-13-2007.
Lowest August temperature:
37°F on 08-31-2020.
Average temperature is 71°F
Average high is 82.8°F
Average low is 59.1°F
Temperature data from 1942 to 2022.
Record Precipitation
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1: 0.92" (1964)
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2: 0.60" (1983)
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3: 0.36" (1961)
Precipitation data from 1942 to 2022.