Petaluma, CA Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Petaluma, a city in Sonoma County, California.
Today
92°F
Sunny
Sunny. High near 92, with temperatures falling to around 86 in the afternoon. West wind 0 to 7 mph.
7-day forecast for Petaluma
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 92°F | Sunny | 0 to 7 mph W | 0% |
| Tonight | 53°F | Partly Cloudy then Areas Of Fog | 1 to 6 mph WNW | 0% |
| Wednesday | 89°F | Areas Of Fog then Mostly Sunny | 1 to 7 mph W | 0% |
| Wednesday Night | 53°F | Patchy Fog | 1 to 7 mph W | 0% |
| Thursday | 86°F | Areas Of Fog then Mostly Sunny | 0 to 8 mph W | 0% |
| Thursday Night | 52°F | Partly Cloudy | 0 to 8 mph W | 0% |
| Friday | 91°F | Mostly Sunny | 0 to 8 mph W | 0% |
| Friday Night | 54°F | Partly Cloudy | 0 to 8 mph WSW | 0% |
| Saturday | 90°F | Sunny | 0 to 7 mph WSW | 0% |
| Saturday Night | 57°F | Mostly Clear | 0 to 7 mph SW | 0% |
| Sunday | 86°F | Patchy Fog then Sunny | 0 to 8 mph SSW | 0% |
| Sunday Night | 54°F | Partly Cloudy then Areas Of Fog | 1 to 8 mph SW | 0% |
| Monday | 81°F | Areas Of Fog then Sunny | 1 to 8 mph SSW | 0% |
| Monday Night | 53°F | Partly Cloudy | 0 to 8 mph SW | 0% |
Forecast source: National Weather Service (api.weather.gov) for Petaluma (38.242, -122.629). Updated through the day.
Growing snapshot for Petaluma
Last spring frost
Feb 28
First fall frost
Nov 25
Growing season
271 days
Hardiness zone
9b
More local growing data for Petaluma: nearby ZIP 94954 weather · frost dates · planting calendar · California frost dates
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Climate data from the nearest NOAA station, Petaluma Ap, Ca (3.2 mi from Petaluma). Frost dates are 1991–2020 averages, not a forecast. Page updated Aug 4, 2026.