Records for Rapid City Area, South Dakota (RAPthr) on 05-21
Record Highs
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1: 92°F (1966)
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2: 92°F (1954)
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3: 91°F (1964)
Record Lows
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1: 28°F (2022)
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2: 29°F (1963)
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3: 30°F (2015)
Lowest Highs
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1: 62°F (1954)
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2: 58°F (1991)
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3: 58°F (1964)
Highest Lows
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1: 40°F (2019)
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2: 46°F (1969)
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3: 48°F (2022)
Highest May temperature:
98°F on 05-27-1969.
Lowest May temperature:
18°F on 05-01-1950.
Average temperature is 56.9°F
Average high is 67.2°F
Average low is 46.5°F
Temperature data from 1942 to 2022.
Record Precipitation
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1: 2.80" (1999)
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2: 2.34" (2019)
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3: 1.86" (1962)
Precipitation data from 1942 to 2022.