Guerneville, CA Weather & Growing Conditions
Today
96°F
Sunny
Sunny. High near 96, with temperatures falling to around 90 in the afternoon. South wind 1 to 7 mph.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 96°F | Sunny | 1 to 7 mph S | 0% |
| Tonight | 53°F | Areas Of Fog | 2 mph WSW | 1% |
| Wednesday | 86°F | Areas Of Fog then Mostly Sunny | 0 to 6 mph SSW | 0% |
| Wednesday Night | 52°F | Areas Of Fog | 0 to 3 mph WNW | 0% |
| Thursday | 83°F | Areas Of Fog then Sunny | 0 to 6 mph WSW | 0% |
| Thursday Night | 54°F | Mostly Clear then Patchy Fog | 0 to 5 mph WNW | 0% |
| Friday | 93°F | Sunny | 0 to 6 mph WSW | 0% |
| Friday Night | 56°F | Mostly Clear | 0 to 5 mph WNW | 0% |
| Saturday | 93°F | Sunny | 0 to 6 mph WSW | 0% |
| Saturday Night | 59°F | Mostly Clear | 1 to 5 mph WNW | 0% |
| Sunday | 93°F | Sunny | 1 to 7 mph W | 0% |
| Sunday Night | 55°F | Mostly Clear | 0 to 6 mph WNW | 0% |
| Monday | 83°F | Sunny | 0 to 6 mph SW | 0% |
| Monday Night | 53°F | Mostly Clear | 0 to 6 mph W | 0% |
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 Aug 4, 2026.