Penngrove, CA Weather & Growing Conditions
Overnight
53°F
Mostly Clear
Mostly clear, with a low around 53. Wind around 0 mph.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Overnight | 53°F | Mostly Clear | 0 mph | 0% |
| Tuesday | 89°F | Haze then Sunny | 0 to 6 mph W | 0% |
| Tuesday Night | 52°F | Areas Of Fog | 0 to 3 mph WNW | 0% |
| Wednesday | 86°F | Areas Of Fog then Mostly Sunny | 0 to 6 mph W | 0% |
| Wednesday Night | 51°F | Areas Of Fog | 0 to 5 mph WSW | 0% |
| Thursday | 83°F | Areas Of Fog then Mostly Sunny | 0 to 6 mph W | 0% |
| Thursday Night | 51°F | Partly Cloudy | 0 to 6 mph WSW | 0% |
| Friday | 89°F | Sunny | 0 to 6 mph W | 0% |
| Friday Night | 53°F | Partly Cloudy | 0 to 6 mph WSW | 0% |
| Saturday | 89°F | Sunny | 0 to 5 mph W | 0% |
| Saturday Night | 56°F | Mostly Clear | 0 to 5 mph SW | 0% |
| Sunday | 86°F | Sunny | 0 to 6 mph SSW | 0% |
| Sunday Night | 53°F | Mostly Clear then Areas Of Fog | 0 to 6 mph SSW | 0% |
| Monday | 80°F | Patchy Fog then Sunny | 0 to 7 mph SSW | 0% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for Penngrove, CA
Last spring frost
Feb 28
First fall frost
Nov 25
Growing season
271 days
Hardiness zone
9b
Explore more for Penngrove, CA: full frost dates · planting calendar · California frost dates
Climate data from the nearest NOAA station, Petaluma Ap, Ca (4.9 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Aug 4, 2026.