Petaluma, CA Weather & Growing Conditions
Today
91°F
Sunny
Sunny. High near 91, with temperatures falling to around 86 in the afternoon. West wind 0 to 8 mph.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 91°F | Sunny | 0 to 8 mph W | 0% |
| Tonight | 53°F | Partly Cloudy then Patchy Fog | 2 to 7 mph WNW | 0% |
| Wednesday | 88°F | Patchy Fog then Mostly Sunny | 2 to 8 mph WSW | 0% |
| Wednesday Night | 53°F | Partly Cloudy then Patchy Fog | 2 to 8 mph W | 0% |
| Thursday | 86°F | Patchy Fog then Mostly Sunny | 2 to 9 mph WSW | 0% |
| Thursday Night | 52°F | Partly Cloudy | 1 to 9 mph W | 0% |
| Friday | 91°F | Sunny | 1 to 9 mph WSW | 0% |
| Friday Night | 54°F | Partly Cloudy | 0 to 9 mph W | 0% |
| Saturday | 90°F | Sunny | 0 to 8 mph WSW | 0% |
| Saturday Night | 56°F | Mostly Clear | 1 to 8 mph SW | 0% |
| Sunday | 87°F | Sunny | 1 to 9 mph SSW | 0% |
| Sunday Night | 54°F | Mostly Clear then Patchy Fog | 2 to 9 mph SW | 0% |
| Monday | 80°F | Patchy Fog then Sunny | 2 to 9 mph SSW | 0% |
| Monday Night | 52°F | Partly Cloudy | 2 to 9 mph SW | 0% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for Petaluma, CA
Last spring frost
Feb 28
First fall frost
Nov 25
Growing season
271 days
Hardiness zone
9b
Explore more for Petaluma, CA: full frost dates · planting calendar · California frost dates
Climate data from the nearest NOAA station, Petaluma Ap, Ca (3.2 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Aug 4, 2026.