Lagunitas-Forest Knolls, CA Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Lagunitas-Forest Knolls, a community in Marin County, California.
Overnight
52°F
Patchy Fog
Patchy fog. Mostly clear. Low around 52, with temperatures rising to around 54 overnight. South wind around 2 mph.
7-day forecast for Lagunitas-Forest Knolls
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Overnight | 52°F | Patchy Fog | 2 mph S | 0% |
| Tuesday | 80°F | Haze then Sunny | 2 to 7 mph SSW | 1% |
| Tuesday Night | 53°F | Patchy Fog | 5 mph SW | 2% |
| Wednesday | 77°F | Mostly Sunny | 2 to 7 mph SW | 3% |
| Wednesday Night | 53°F | Areas Of Fog | 1 to 6 mph WSW | 0% |
| Thursday | 76°F | Areas Of Fog then Mostly Sunny | 1 to 7 mph WSW | 0% |
| Thursday Night | 53°F | Patchy Fog | 1 to 7 mph W | 0% |
| Friday | 82°F | Patchy Fog then Sunny | 1 to 7 mph W | 0% |
| Friday Night | 54°F | Partly Cloudy | 1 to 7 mph W | 0% |
| Saturday | 79°F | Sunny | 1 to 7 mph W | 0% |
| Saturday Night | 56°F | Mostly Clear | 7 mph WNW | 0% |
| Sunday | 78°F | Sunny | 5 to 9 mph W | 0% |
| Sunday Night | 54°F | Mostly Clear | 5 to 9 mph W | 0% |
| Monday | 70°F | Sunny | 5 to 8 mph SW | 0% |
Forecast source: National Weather Service (api.weather.gov) for Lagunitas-Forest Knolls (38.018, -122.691). Updated through the day.
Growing snapshot for Lagunitas-Forest Knolls
Last spring frost
Jan 11
First fall frost
Dec 21
Growing season
349 days
Hardiness zone
10a
More local growing data for Lagunitas-Forest Knolls: nearby ZIP 94933 weather · frost dates · planting calendar · California frost dates
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Climate data from the nearest NOAA station, San Rafael Civic Ctr, Ca (8.3 mi from Lagunitas-Forest Knolls). Frost dates are 1991–2020 averages, not a forecast. Page updated Aug 4, 2026.