Records for Great Falls Area, Montana (GTFthr) on 05-21
Record Highs
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1: 93°F (1980)
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2: 89°F (1928)
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3: 88°F (1967)
Record Lows
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1: 24°F (2022)
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2: 26°F (2021)
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3: 30°F (2009)
Lowest Highs
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1: 63°F (1925)
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2: 56°F (1966)
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3: 55°F (2012)
Highest Lows
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1: 30°F (2021)
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2: 45°F (1987)
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3: 46°F (1974)
Highest May temperature:
100°F on 05-28-1919.
Lowest May temperature:
12°F on 05-01-2009.
Average temperature is 55.8°F
Average high is 68.1°F
Average low is 43.5°F
Temperature data from 1891 to 2022.
Record Precipitation
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1: 1.43" (1962)
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2: 1.13" (1927)
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3: 0.85" (1893)
Precipitation data from 1891 to 2022.