Petaluma, CA Weather & Growing Conditions
This Afternoon
80°F
Sunny
Sunny. High near 80, with temperatures falling to around 75 in the afternoon. West wind around 12 mph, with gusts as high as 20 mph.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 80°F | Sunny | 12 mph W | 0% |
| Tonight | 52°F | Partly Cloudy then Areas Of Fog | 0 to 10 mph WNW | 0% |
| Saturday | 84°F | Areas Of Fog then Mostly Sunny | 0 to 9 mph SW | 0% |
| Saturday Night | 53°F | Patchy Fog | 1 to 8 mph W | 0% |
| Sunday | 77°F | Patchy Fog then Partly Sunny | 1 to 7 mph SW | 0% |
| Sunday Night | 52°F | Mostly Cloudy then Patchy Fog | 1 to 7 mph SW | 0% |
| Monday | 79°F | Areas Of Fog then Mostly Sunny | 1 to 8 mph SW | 0% |
| Monday Night | 52°F | Partly Cloudy then Areas Of Fog | 1 to 8 mph WSW | 0% |
| Tuesday | 82°F | Areas Of Fog then Mostly Sunny | 0 to 8 mph SW | 0% |
| Tuesday Night | 53°F | Partly Cloudy then Patchy Fog | 0 to 8 mph W | 0% |
| Wednesday | 90°F | Areas Of Fog then Mostly Sunny | 0 to 7 mph S | 0% |
| Wednesday Night | 56°F | Partly Cloudy | 0 to 7 mph NW | 0% |
| Thursday | 90°F | Mostly Sunny | 0 to 7 mph WSW | 0% |
| Thursday Night | 56°F | Partly Cloudy | 2 to 7 mph W | 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 Sep 19, 2026.