Records for Helena Area, Montana (HLNthr) on 12-20
Record Highs
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1: 55°F (1900)
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2: 54°F (2019)
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3: 53°F (1933)
Record Lows
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1: -25°F (1990)
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2: -22°F (1924)
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3: -20°F (1998)
Lowest Highs
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1: 37°F (1933)
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2: 37°F (1896)
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3: 36°F (2020)
Highest Lows
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1: -18°F (1990)
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2: -8°F (1983)
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3: -6°F (1998)
Highest December temperature:
70°F on 12-01-2021.
Lowest December temperature:
-40°F on 12-30-1880.
Average temperature is 22.2°F
Average high is 31.4°F
Average low is 13°F
Temperature data from 1880 to 2022.
Record Precipitation
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1: 0.28" (2017)
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2: 0.21" (1964)
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3: 0.20" (1906)
Precipitation data from 1880 to 2022.