Records for Helena Area, Montana (HLNthr) on 09-21
Record Highs
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1: 90°F (1967)
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2: 90°F (1966)
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3: 87°F (1979)
Record Lows
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1: 20°F (1995)
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2: 22°F (1971)
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3: 26°F (1895)
Lowest Highs
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1: 55°F (1885)
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2: 54°F (1905)
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3: 54°F (1889)
Highest Lows
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1: 39°F (1955)
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2: 43°F (1895)
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3: 44°F (1968)
Highest September temperature:
102°F on 09-07-2022.
Lowest September temperature:
6°F on 09-24-1926.
Average temperature is 57.1°F
Average high is 71.1°F
Average low is 43.1°F
Temperature data from 1880 to 2022.
Record Precipitation
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1: 1.30" (1937)
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2: 0.68" (1945)
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3: 0.38" (1931)
Precipitation data from 1880 to 2022.