Records for Boise Area, Idaho (BOIthr) on 05-20
Record Highs
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1: 94°F (1958)
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2: 91°F (1954)
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3: 91°F (1897)
Record Lows
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1: 29°F (1898)
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2: 33°F (1971)
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3: 33°F (1927)
Lowest Highs
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1: 60°F (1880)
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2: 59°F (2006)
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3: 59°F (1993)
Highest Lows
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1: 48°F (1902)
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2: 49°F (1962)
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3: 51°F (2020)
Highest May temperature:
100°F on 05-29-1897.
Lowest May temperature:
22°F on 05-05-1982.
Average temperature is 61.2°F
Average high is 73.7°F
Average low is 48.8°F
Temperature data from 1875 to 2022.
Record Precipitation
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1: 0.80" (2020)
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2: 0.56" (1985)
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3: 0.47" (1912)
Precipitation data from 1878 to 2022.