Records for Boise Area, Idaho (BOIthr) on 09-20
Record Highs
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1: 94°F (1922)
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2: 92°F (1939)
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3: 91°F (1918)
Record Lows
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1: 32°F (1924)
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2: 33°F (1983)
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3: 35°F (1887)
Lowest Highs
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1: 61°F (1910)
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2: 59°F (1938)
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3: 58°F (1963)
Highest Lows
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1: 49°F (1968)
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2: 54°F (1895)
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3: 56°F (1986)
Highest September temperature:
104°F on 09-07-2022.
Lowest September temperature:
23°F on 09-14-1970.
Average temperature is 64.9°F
Average high is 78.3°F
Average low is 51.4°F
Temperature data from 1875 to 2022.
Record Precipitation
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1: 0.90" (2008)
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2: 0.49" (1984)
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3: 0.30" (1977)
Precipitation data from 1878 to 2022.