Records for Great Falls Area, Montana (GTFthr) on 05-20
Record Highs
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1: 94°F (1897)
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2: 91°F (1919)
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3: 88°F (1964)
Record Lows
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1: 26°F (2021)
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2: 28°F (1903)
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3: 30°F (1931)
Lowest Highs
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1: 60°F (1980)
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2: 55°F (1986)
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3: 55°F (1954)
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:
100°F on 05-28-1919.
Lowest May temperature:
12°F on 05-01-2009.
Average temperature is 55.6°F
Average high is 68°F
Average low is 43.2°F
Temperature data from 1891 to 2022.
Record Precipitation
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1: 1.76" (1957)
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2: 0.80" (1974)
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3: 0.66" (1902)
Precipitation data from 1891 to 2022.