Highest September Temperatures in Riverside
A list of the highest temperatures ever recorded in the month of
September in
Riverside, California from 1893–2024.
What's the hottest it has ever gotten in Riverside in September?
The hottest September temperature in Riverside, California history was 117 °F which has occurred twice, most recently on September 6, 2020.
| Rank |
Temperature |
Date |
| 1 |
117 °F |
September 6, 2020 |
| 1 |
117 °F |
September 5, 2020 |
| 3 |
115 °F |
September 6, 1955 |
| 4 |
113 °F |
September 27, 2010 |
| 4 |
113 °F |
September 13, 1971 |
| 4 |
113 °F |
September 22, 1943 |
| 7 |
112 °F |
September 1, 2017 |
| 7 |
112 °F |
September 5, 1955 |
| 7 |
112 °F |
September 3, 1955 |
| 7 |
112 °F |
September 17, 1922 |
| 11 |
111 °F |
September 3, 1988 |
| 11 |
111 °F |
September 5, 1984 |
| 11 |
111 °F |
September 2, 1982 |
| 11 |
111 °F |
September 9, 1979 |
| 11 |
111 °F |
September 12, 1971 |
| 11 |
111 °F |
September 27, 1921 |
| 11 |
111 °F |
September 17, 1913 |
| 18 |
110 °F |
September 4, 2022 |
| 18 |
110 °F |
September 26, 2010 |
| 18 |
110 °F |
September 1, 2002 |
| 18 |
110 °F |
September 7, 1955 |
| 18 |
110 °F |
September 7, 1944 |
| 18 |
110 °F |
September 16, 1922 |
| 18 |
110 °F |
September 26, 1921 |
| 18 |
110 °F |
September 9, 1910 |
| 18 |
110 °F |
September 7, 1904 |