|
Typical Ketchum September Weather 1991–2020 |
||
|---|---|---|
| Average daily high | 70.0 °F | |
| Average daily low | 35.6 °F | |
| Average monthly precipitation | 0.7 inches | |
| Average monthly snow | 0.0 inches | |
|
Ketchum September Weather Records 1937–2023 |
||
|---|---|---|
| Highest temperature | 93 °F | September 1, 1955 |
| Lowest temperature | 11 °F | September 30, 1954 |
| Highest daily low | 55 °F | September 16, 2014 |
| Lowest daily high | 39 °F | September 17, 1965 |
| Hottest average temperature | 4.4 °F above average |
1998 |
| Coldest average temperature | -8.0 °F below average |
1941 |
| Most daily precipitation | 1.6 inches | September 6, 1978 |
| Most monthly precipitation | 4.7 inches | 1985 |
| Most daily snow | 3.0 inches | September 18, 1978 |
| Most monthly snow | 3.5 inches | 1954 |
| Day | Average (°F) | Record (°F) | ||
|---|---|---|---|---|
| High | Low | High | Low | |
| September 1 | 75.3 | 39.3 | 93 | 21 |
| September 2 | 75.0 | 39.1 | 92 | 24 |
| September 3 | 74.6 | 38.9 | 92 | 16 |
| September 4 | 74.1 | 38.7 | 90 | 15 |
| September 5 | 73.6 | 38.4 | 90 | 21 |
| September 6 | 73.2 | 38.1 | 90 | 18 |
| September 7 | 72.8 | 37.8 | 92 | 20 |
| September 8 | 72.4 | 37.5 | 90 | 20 |
| September 9 | 72.0 | 37.3 | 88 | 17 |
| September 10 | 71.6 | 37.1 | 86 | 13 |
| September 11 | 71.3 | 36.8 | 87 | 22 |
| September 12 | 70.9 | 36.5 | 86 | 19 |
| September 13 | 70.5 | 36.3 | 86 | 16 |
| September 14 | 70.2 | 36.0 | 86 | 18 |
| September 15 | 69.9 | 35.9 | 87 | 13 |
| September 16 | 69.7 | 35.6 | 84 | 16 |
| September 17 | 69.4 | 35.4 | 85 | 13 |
| September 18 | 69.1 | 35.2 | 86 | 12 |
| September 19 | 68.6 | 34.9 | 85 | 13 |
| September 20 | 68.0 | 34.5 | 83 | 12 |
| September 21 | 67.5 | 34.2 | 84 | 17 |
| September 22 | 67.0 | 34.0 | 85 | 12 |
| September 23 | 66.5 | 33.7 | 83 | 16 |
| September 24 | 66.1 | 33.4 | 84 | 14 |
| September 25 | 65.7 | 33.2 | 84 | 15 |
| September 26 | 65.2 | 32.8 | 83 | 17 |
| September 27 | 64.8 | 32.5 | 84 | 17 |
| September 28 | 64.3 | 32.2 | 84 | 14 |
| September 29 | 63.8 | 31.8 | 84 | 13 |
| September 30 | 63.4 | 31.5 | 82 | 11 |