Lagunitas-Forest Knolls, CA Weather & Growing Conditions
Today
78°F
Sunny
Sunny. High near 78, with temperatures falling to around 74 in the afternoon. South southwest wind 2 to 8 mph.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 78°F | Sunny | 2 to 8 mph SSW | 1% |
| Tonight | 53°F | Patchy Fog | 1 to 5 mph SSW | 2% |
| Wednesday | 76°F | Patchy Fog then Mostly Sunny | 2 to 7 mph SW | 2% |
| Wednesday Night | 53°F | Areas Of Fog | 0 to 6 mph SW | 0% |
| Thursday | 75°F | Areas Of Fog then Mostly Sunny | 0 to 7 mph WSW | 0% |
| Thursday Night | 53°F | Patchy Fog | 1 to 7 mph W | 0% |
| Friday | 81°F | Patchy Fog then Sunny | 1 to 8 mph W | 0% |
| Friday Night | 54°F | Partly Cloudy then Patchy Fog | 0 to 8 mph WNW | 0% |
| Saturday | 80°F | Sunny | 0 to 8 mph WNW | 0% |
| Saturday Night | 56°F | Mostly Clear | 3 to 8 mph WNW | 0% |
| Sunday | 78°F | Sunny | 3 to 9 mph W | 0% |
| Sunday Night | 54°F | Mostly Clear | 3 to 9 mph W | 0% |
| Monday | 71°F | Sunny | 3 to 9 mph SW | 0% |
| Monday Night | 53°F | Partly Cloudy | 2 to 8 mph WSW | 0% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for Lagunitas-Forest Knolls, CA
Last spring frost
Jan 11
First fall frost
Dec 21
Growing season
349 days
Hardiness zone
9b
Explore more for Lagunitas-Forest Knolls, CA: full frost dates · planting calendar · California frost dates
Climate data from the nearest NOAA station, San Rafael Civic Ctr, Ca (10.7 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Aug 4, 2026.