Records for Boise Area, Idaho (BOIthr) on 12-20
Record Highs
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1: 57°F (1964)
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2: 57°F (1900)
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3: 55°F (1940)
Record Lows
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1: -8°F (1990)
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2: -6°F (1983)
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3: -5°F (1984)
Lowest Highs
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1: 43°F (1955)
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2: 43°F (1933)
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3: 41°F (1940)
Highest Lows
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1: 9°F (1990)
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2: 10°F (1984)
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3: 12°F (1985)
Highest December temperature:
70°F on 12-10-1939.
Lowest December temperature:
-25°F on 12-22-1990.
Average temperature is 31.2°F
Average high is 37.8°F
Average low is 24.6°F
Temperature data from 1875 to 2022.
Record Precipitation
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1: 0.71" (2014)
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2: 0.71" (1996)
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3: 0.57" (1974)
Precipitation data from 1878 to 2022.