Guerneville, CA Weather & Growing Conditions
Overnight
46°F
Mostly Clear
Mostly clear. Low around 46, with temperatures rising to around 48 overnight. North northwest wind around 2 mph.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Overnight | 46°F | Mostly Clear | 2 mph NNW | 0% |
| Wednesday | 67°F | Patchy Fog then Sunny | 1 to 8 mph NW | 3% |
| Wednesday Night | 48°F | Mostly Cloudy | 2 to 7 mph NW | 2% |
| Thursday | 72°F | Sunny | 3 mph WNW | 0% |
| Thursday Night | 46°F | Mostly Clear | 2 mph NNW | 0% |
| Friday | 73°F | Sunny | 2 mph NW | 0% |
| Friday Night | 48°F | Mostly Clear | 2 mph NNW | 0% |
| Saturday | 74°F | Sunny | 2 mph N | 0% |
| Saturday Night | 48°F | Mostly Clear | 2 mph NW | 0% |
| Sunday | 73°F | Mostly Sunny | 2 mph NW | 0% |
| Sunday Night | 49°F | Partly Cloudy | 2 mph NW | 0% |
| Monday | 70°F | Mostly Sunny | 3 mph NW | 2% |
| Monday Night | 49°F | Partly Cloudy | 3 mph NW | 3% |
| Tuesday | 70°F | Slight Chance Light Rain | 0 to 3 mph NW | 15% |
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 Nov 4, 2026.