Records for Boise Area, Idaho (BOIthr) on 09-18
Record Highs
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1: 98°F (1875)
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2: 96°F (1981)
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3: 95°F (1938)
Record Lows
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1: 27°F (1965)
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2: 28°F (1988)
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3: 34°F (1942)
Lowest Highs
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1: 64°F (2014)
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2: 64°F (1981)
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3: 62°F (2021)
Highest Lows
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1: 54°F (1978)
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2: 56°F (1965)
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3: 58°F (1947)
Highest September temperature:
104°F on 09-07-2022.
Lowest September temperature:
23°F on 09-14-1970.
Average temperature is 65.6°F
Average high is 79.2°F
Average low is 52°F
Temperature data from 1875 to 2022.
Record Precipitation
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1: 0.86" (1882)
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2: 0.41" (1959)
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3: 0.23" (1961)
Precipitation data from 1878 to 2022.