Records for Helena Area, Montana (HLNthr) on 05-18
Record Highs
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1: 91°F (2006)
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2: 87°F (2009)
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3: 87°F (2008)
Record Lows
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1: 26°F (1903)
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2: 28°F (1942)
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3: 29°F (1965)
Lowest Highs
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1: 55°F (1886)
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2: 54°F (2008)
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3: 54°F (1992)
Highest Lows
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1: 38°F (1903)
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2: 44°F (2003)
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3: 44°F (1913)
Highest May temperature:
95°F on 05-28-1919.
Lowest May temperature:
17°F on 05-02-1954.
Average temperature is 54.8°F
Average high is 67.2°F
Average low is 42.3°F
Temperature data from 1880 to 2022.
Record Precipitation
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1: 1.10" (1944)
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2: 0.67" (1901)
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3: 0.61" (1938)
Precipitation data from 1880 to 2022.