Records for Helena Area, Montana (HLNthr) on 05-21
Record Highs
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1: 89°F (1980)
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2: 86°F (1967)
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3: 86°F (1958)
Record Lows
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1: 27°F (2021)
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2: 27°F (1953)
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3: 30°F (1996)
Lowest Highs
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1: 55°F (2000)
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2: 54°F (1958)
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3: 54°F (1919)
Highest Lows
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1: 33°F (2021)
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2: 40°F (1927)
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3: 46°F (1903)
Highest May temperature:
95°F on 05-28-1919.
Lowest May temperature:
17°F on 05-02-1954.
Average temperature is 55.6°F
Average high is 68°F
Average low is 43.2°F
Temperature data from 1880 to 2022.
Record Precipitation
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1: 1.93" (1981)
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2: 1.50" (1893)
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3: 1.32" (2007)
Precipitation data from 1880 to 2022.