Records for Helena Area, Montana (HLNthr) on 05-20
Record Highs
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1: 90°F (2002)
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2: 89°F (1958)
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3: 87°F (2008)
Record Lows
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1: 28°F (2021)
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2: 28°F (1959)
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3: 30°F (2003)
Lowest Highs
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1: 57°F (1919)
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2: 57°F (1886)
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3: 55°F (2002)
Highest Lows
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1: 37°F (1987)
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2: 39°F (2021)
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3: 41°F (1974)
Highest May temperature:
95°F on 05-28-1919.
Lowest May temperature:
17°F on 05-02-1954.
Average temperature is 55.4°F
Average high is 67.8°F
Average low is 42.9°F
Temperature data from 1880 to 2022.
Record Precipitation
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1: 1.78" (1957)
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2: 1.66" (1902)
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3: 0.70" (1887)
Precipitation data from 1880 to 2022.