Typical Boise September Weather 1991–2020 |
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---|---|---|
Average daily high | 80.0 °F | |
Average daily low | 52.1 °F | |
Average monthly precipitation | 0.4 inches | |
Average monthly snow | none | |
Daily chance of precipitation | 12.9% | |
Daily chance of snow | 0% |
Boise September Weather Records 1911–2024 |
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---|---|---|
Highest temperature | 105 °F | September 4, 1924 |
Lowest temperature | 22 °F | September 24, 1926 |
Highest daily low | 76 °F | September 5, 1998 |
Lowest daily high | 48 °F | September 30, 1971 |
Hottest average high temperature | 86.4 °F | 2011 |
Coldest average high temperature | 68.8 °F | 1985 |
Most daily precipitation | 1.7 inches | September 11, 1976 |
Most monthly precipitation | 2.9 inches | 1986 |
Most daily snow | none | - |
Most monthly snow | none | - |
Day | Average (°F) | Record (°F) | ||
---|---|---|---|---|
High | Low | High | Low | |
September 1 | 85.8 | 56.5 | 102 | 36 |
September 2 | 85.4 | 56.3 | 101 | 38 |
September 3 | 84.9 | 56.0 | 102 | 37 |
September 4 | 84.4 | 55.7 | 105 | 36 |
September 5 | 83.9 | 55.3 | 100 | 36 |
September 6 | 83.5 | 55.0 | 101 | 37 |
September 7 | 83.1 | 54.6 | 104 | 31 |
September 8 | 82.7 | 54.3 | 95 | 29 |
September 9 | 82.3 | 54.0 | 98 | 33 |
September 10 | 81.9 | 53.7 | 97 | 34 |
September 11 | 81.5 | 53.4 | 97 | 30 |
September 12 | 81.1 | 53.1 | 94 | 32 |
September 13 | 80.7 | 52.7 | 94 | 28 |
September 14 | 80.3 | 52.4 | 101 | 23 |
September 15 | 80.1 | 52.2 | 95 | 29 |
September 16 | 79.8 | 52.0 | 93 | 29 |
September 17 | 79.5 | 51.7 | 95 | 24 |
September 18 | 79.0 | 51.4 | 97 | 27 |
September 19 | 78.4 | 51.0 | 97 | 31 |
September 20 | 77.9 | 50.6 | 96 | 33 |
September 21 | 77.3 | 50.2 | 95 | 29 |
September 22 | 76.8 | 49.9 | 99 | 28 |
September 23 | 76.4 | 49.6 | 95 | 28 |
September 24 | 76.0 | 49.2 | 98 | 22 |
September 25 | 75.6 | 48.9 | 95 | 23 |
September 26 | 75.0 | 48.5 | 93 | 23 |
September 27 | 74.4 | 48.1 | 95 | 28 |
September 28 | 73.9 | 47.6 | 95 | 29 |
September 29 | 73.4 | 47.2 | 95 | 27 |
September 30 | 72.9 | 46.8 | 96 | 29 |