Lowest September Temperatures in Ketchum
A list of the lowest temperatures ever recorded in the month of
September in
Ketchum, Idaho from 1937–2024.
What's the coldest it has ever gotten in Ketchum in September?
The coldest September temperature in Ketchum, Idaho history was 11 °F which occurred on September 30, 1954.
| Rank |
Temperature |
Date |
| 1 |
11 °F |
September 30, 1954 |
| 2 |
12 °F |
September 22, 1956 |
| 2 |
12 °F |
September 20, 1944 |
| 2 |
12 °F |
September 18, 1944 |
| 5 |
13 °F |
September 18, 1965 |
| 5 |
13 °F |
September 10, 1964 |
| 5 |
13 °F |
September 29, 1955 |
| 5 |
13 °F |
September 17, 1949 |
| 5 |
13 °F |
September 19, 1944 |
| 5 |
13 °F |
September 15, 1944 |
| 5 |
13 °F |
September 19, 1942 |
| 12 |
14 °F |
September 24, 2008 |
| 12 |
14 °F |
September 19, 1965 |
| 12 |
14 °F |
September 28, 1955 |
| 15 |
15 °F |
September 25, 1972 |
| 15 |
15 °F |
September 25, 1970 |
| 15 |
15 °F |
September 30, 1955 |
| 15 |
15 °F |
September 29, 1954 |
| 15 |
15 °F |
September 28, 1950 |
| 15 |
15 °F |
September 19, 1947 |
| 15 |
15 °F |
September 19, 1943 |
| 15 |
15 °F |
September 4, 1943 |
| 15 |
15 °F |
September 17, 1942 |
| 15 |
15 °F |
September 28, 1941 |