Petaluma, CA
Climate overview — based on NOAA 1991-2020 normals from PETALUMA AP, CA US.
Year-round temperatures (°F)
Climate summary
Petaluma has an annual average temperature of 58°F with about 25.6 inches of precipitation per year. The warmest month is September (average high 81.6°F), and the coldest is December (average low 38.4°F). February is typically the wettest month (5.23 in) and July the driest (0.01 in).
Best time to visit Petaluma
Full guide →Climate change signal
All-time records →26 of 366 (7.1%) of Petaluma's all-time daily heat records have been set since 2015. If records were spread evenly across the station's history, only about 5% would fall in any given decade.
| 1890s | 0 | |
| 1910s | 32 | |
| 1920s | 57 | |
| 1930s | 50 | |
| 1940s | 11 | |
| 1950s | 27 | |
| 1960s | 40 | |
| 1970s | 40 | |
| 1980s | 37 | |
| 1990s | 25 | |
| 2000s | 15 | |
| 2010s | 17 | |
| 2020s | 15 |
Bars: number of all-time daily heat records still standing that were set in each decade.
Monthly averages
| Month | Avg High | Avg Low | Avg Temp | Precipitation | Snow | Rainy days |
|---|---|---|---|---|---|---|
| January | 57.6°F | 39.0°F | 48.3°F | 4.77 in | — | 12 |
| February | 61.3°F | 40.4°F | 50.8°F | 5.23 in | — | 11 |
| March | 64.5°F | 41.9°F | 53.2°F | 3.32 in | — | 10 |
| April | 67.8°F | 43.8°F | 55.8°F | 1.68 in | — | 6 |
| May | 71.9°F | 47.4°F | 59.6°F | 0.93 in | — | 4 |
| June | 78.1°F | 50.4°F | 64.3°F | 0.28 in | — | 1 |
| July | 80.8°F | 52.4°F | 66.6°F | 0.01 in | — | 0 |
| August | 81.2°F | 52.8°F | 67.0°F | 0.05 in | — | 0 |
| September | 81.6°F | 51.4°F | 66.5°F | 0.09 in | — | 1 |
| October | 76.4°F | 47.6°F | 62.0°F | 1.27 in | — | 4 |
| November | 65.5°F | 42.3°F | 53.9°F | 2.74 in | — | 8 |
| December | 57.9°F | 38.4°F | 48.1°F | 5.19 in | — | 12 |
Climate twins of Petaluma
Why these? →The most climatically similar US cities at least 140 miles away (by monthly temperature + precipitation pattern).