Highest September Temperatures in Seattle
A list of the highest temperatures ever recorded in the month of
September in
Seattle, Washington from 1894–2024.
What's the hottest it has ever gotten in Seattle in September?
The hottest September temperature in Seattle, Washington history was 98 °F which occurred on September 2, 1988.
| Rank |
Temperature |
Date |
| 1 |
98 °F |
September 2, 1988 |
| 2 |
94 °F |
September 7, 1981 |
| 3 |
93 °F |
September 11, 2013 |
| 3 |
93 °F |
September 14, 1979 |
| 3 |
93 °F |
September 15, 1967 |
| 6 |
92 °F |
September 10, 2022 |
| 6 |
92 °F |
September 22, 1990 |
| 6 |
92 °F |
September 3, 1988 |
| 6 |
92 °F |
September 14, 1937 |
| 10 |
91 °F |
September 10, 2020 |
| 10 |
91 °F |
September 22, 1989 |
| 10 |
91 °F |
September 1, 1987 |
| 10 |
91 °F |
September 2, 1974 |
| 10 |
91 °F |
September 16, 1967 |
| 15 |
90 °F |
September 3, 2017 |
| 15 |
90 °F |
September 2, 2017 |
| 15 |
90 °F |
September 6, 2014 |
| 15 |
90 °F |
September 7, 2012 |
| 15 |
90 °F |
September 2, 1934 |
| 20 |
89 °F |
September 2, 2006 |
| 20 |
89 °F |
September 15, 1981 |
| 20 |
89 °F |
September 24, 1974 |
| 20 |
89 °F |
September 27, 1967 |
| 20 |
89 °F |
September 9, 1963 |