Records for Boise Area, Idaho (BOIthr) on 09-21
Record Highs
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1: 95°F (1967)
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2: 94°F (1938)
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3: 93°F (1954)
Record Lows
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1: 30°F (1993)
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2: 33°F (1895)
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3: 34°F (1983)
Lowest Highs
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1: 63°F (1917)
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2: 62°F (2014)
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3: 60°F (1967)
Highest Lows
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1: 52°F (1968)
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2: 56°F (1895)
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3: 57°F (1961)
Highest September temperature:
104°F on 09-07-2022.
Lowest September temperature:
23°F on 09-14-1970.
Average temperature is 64.5°F
Average high is 77.9°F
Average low is 51°F
Temperature data from 1875 to 2022.
Record Precipitation
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1: 0.29" (1913)
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2: 0.26" (1893)
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3: 0.15" (2016)
Precipitation data from 1878 to 2022.