Highest September Temperatures in San Luis Obispo
A list of the highest temperatures ever recorded in the month of
September in
San Luis Obispo, California from 1893–2024.
What's the hottest it has ever gotten in San Luis Obispo in September?
The hottest September temperature in San Luis Obispo, California history was 117 °F which occurred on September 6, 2020.
| Rank |
Temperature |
Date |
| 1 |
117 °F |
September 6, 2020 |
| 2 |
114 °F |
September 2, 2017 |
| 3 |
112 °F |
September 14, 1971 |
| 4 |
111 °F |
September 27, 2010 |
| 5 |
110 °F |
September 28, 2010 |
| 5 |
110 °F |
September 2, 1955 |
| 7 |
108 °F |
September 7, 2020 |
| 7 |
108 °F |
September 27, 2016 |
| 9 |
107 °F |
September 30, 2020 |
| 9 |
107 °F |
September 12, 1983 |
| 9 |
107 °F |
September 21, 1943 |
| 12 |
106 °F |
September 1, 2017 |
| 13 |
105 °F |
September 3, 2022 |
| 13 |
105 °F |
September 25, 2010 |
| 13 |
105 °F |
September 2, 2007 |
| 13 |
105 °F |
September 16, 1979 |
| 13 |
105 °F |
September 25, 1978 |
| 13 |
105 °F |
September 3, 1955 |
| 13 |
105 °F |
September 1, 1955 |
| 13 |
105 °F |
September 22, 1939 |