Lagunitas-Forest Knolls, CA Weather & Growing Conditions
Today
79°F
Patchy Fog then Sunny
Patchy fog before 9am. Sunny. High near 79, with temperatures falling to around 73 in the afternoon. West wind 1 to 8 mph, with gusts as high as 18 mph.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 79°F | Patchy Fog then Sunny | 1 to 8 mph W | 0% |
| Tonight | 53°F | Partly Cloudy | 3 to 8 mph W | 1% |
| Sunday | 72°F | Mostly Cloudy | 3 to 7 mph W | 1% |
| Sunday Night | 53°F | Mostly Cloudy then Patchy Fog | 1 to 7 mph W | 1% |
| Monday | 72°F | Patchy Fog then Mostly Sunny | 1 to 7 mph WSW | 0% |
| Monday Night | 53°F | Areas Of Fog | 1 to 7 mph WSW | 0% |
| Tuesday | 74°F | Areas Of Fog then Mostly Sunny | 1 to 7 mph SW | 0% |
| Tuesday Night | 53°F | Areas Of Fog | 1 to 7 mph WNW | 0% |
| Wednesday | 85°F | Areas Of Fog then Sunny | 1 to 7 mph W | 0% |
| Wednesday Night | 57°F | Partly Cloudy | 0 to 7 mph WNW | 0% |
| Thursday | 86°F | Sunny | 0 to 7 mph WNW | 0% |
| Thursday Night | 56°F | Partly Cloudy | 2 to 7 mph W | 0% |
| Friday | 78°F | Mostly Sunny | 2 to 8 mph W | 1% |
| Friday Night | 54°F | Partly Cloudy | 2 to 8 mph WSW | 1% |
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
10a
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 (8.3 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.