Lowest September Temperatures in Half Moon Bay
A list of the lowest temperatures ever recorded in the month of
September in
Half Moon Bay, California from 1939–2024.
What's the coldest it has ever gotten in Half Moon Bay in September?
The coldest September temperature in Half Moon Bay, California history was 35 °F which occurred on September 30, 2007.
| Rank |
Temperature |
Date |
| 1 |
35 °F |
September 30, 2007 |
| 2 |
37 °F |
September 25, 2005 |
| 3 |
38 °F |
September 30, 1950 |
| 3 |
38 °F |
September 30, 1945 |
| 5 |
39 °F |
September 30, 2009 |
| 5 |
39 °F |
September 29, 2007 |
| 5 |
39 °F |
September 25, 2007 |
| 5 |
39 °F |
September 17, 2006 |
| 5 |
39 °F |
September 22, 2004 |
| 5 |
39 °F |
September 21, 2004 |
| 11 |
40 °F |
September 24, 2018 |
| 11 |
40 °F |
September 28, 2013 |
| 11 |
40 °F |
September 2, 2008 |
| 11 |
40 °F |
September 24, 2005 |
| 11 |
40 °F |
September 26, 2004 |
| 11 |
40 °F |
September 25, 2004 |
| 11 |
40 °F |
September 24, 2004 |
| 11 |
40 °F |
September 23, 2004 |
| 11 |
40 °F |
September 15, 2002 |
| 11 |
40 °F |
September 4, 1988 |
| 11 |
40 °F |
September 2, 1975 |
| 11 |
40 °F |
September 18, 1970 |