Records for Boise Area, Idaho (BOIthr) on 09-30
Record Highs
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1: 96°F (1992)
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2: 94°F (1876)
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3: 93°F (1963)
Record Lows
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1: 29°F (1954)
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2: 30°F (1891)
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3: 32°F (1981)
Lowest Highs
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1: 67°F (1992)
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2: 64°F (2016)
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3: 62°F (1963)
Highest Lows
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1: 48°F (1971)
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2: 52°F (1950)
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3: 53°F (1893)
Highest September temperature:
104°F on 09-07-2022.
Lowest September temperature:
23°F on 09-14-1970.
Average temperature is 60.7°F
Average high is 73.6°F
Average low is 47.8°F
Temperature data from 1875 to 2022.
Record Precipitation
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1: 0.61" (1983)
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2: 0.54" (1989)
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3: 0.34" (1919)
Precipitation data from 1878 to 2022.