Records for Des Moines Area, Iowa (DSMthr) on 05-21
Record Highs
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1: 94°F (1886)
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2: 91°F (1934)
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3: 90°F (1925)
Record Lows
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1: 35°F (1931)
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2: 35°F (1883)
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3: 37°F (1895)
Lowest Highs
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1: 69°F (2004)
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2: 69°F (1970)
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3: 68°F (1921)
Highest Lows
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1: 53°F (1882)
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2: 55°F (1907)
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3: 56°F (1963)
Highest May temperature:
105°F on 05-30-1934.
Lowest May temperature:
26°F on 05-04-1907.
Average temperature is 64.3°F
Average high is 74.2°F
Average low is 54.3°F
Temperature data from 1878 to 2022.
Record Precipitation
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1: 1.78" (1969)
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2: 1.58" (1891)
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3: 1.19" (2019)
Precipitation data from 1878 to 2022.