Guerneville, CA Weather & Growing Conditions
Overnight
53°F
Mostly Clear
Mostly clear, with a low around 53. West northwest wind around 1 mph.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Overnight | 53°F | Mostly Clear | 1 mph WNW | 0% |
| Saturday | 84°F | Sunny | 0 to 7 mph SW | 0% |
| Saturday Night | 53°F | Partly Cloudy | 0 to 5 mph W | 0% |
| Sunday | 78°F | Patchy Fog then Partly Sunny | 0 to 6 mph SW | 0% |
| Sunday Night | 52°F | Mostly Cloudy then Areas Of Fog | 0 to 3 mph W | 0% |
| Monday | 79°F | Areas Of Fog then Mostly Sunny | 0 to 6 mph SW | 0% |
| Monday Night | 52°F | Areas Of Fog | 0 to 5 mph WNW | 0% |
| Tuesday | 80°F | Areas Of Fog then Sunny | 0 to 5 mph WSW | 0% |
| Tuesday Night | 53°F | Mostly Clear | 0 to 5 mph NW | 0% |
| Wednesday | 87°F | Patchy Fog then Sunny | 0 to 5 mph W | 0% |
| Wednesday Night | 58°F | Mostly Clear | 0 to 5 mph NW | 0% |
| Thursday | 88°F | Sunny | 0 to 5 mph W | 0% |
| Thursday Night | 57°F | Partly Cloudy | 0 to 5 mph WNW | 0% |
| Friday | 82°F | Mostly Sunny | 0 to 6 mph WNW | 1% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for Guerneville, CA
Last spring frost
Jan 29
First fall frost
Dec 30
Growing season
347 days
Hardiness zone
9b
Explore more for Guerneville, CA: full frost dates · planting calendar · California frost dates
Climate data from the nearest NOAA station, Occidental, Ca (9.5 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.