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
54°F
Mostly Clear
Mostly clear, with a low around 54. West northwest wind around 3 mph.
7-day forecast for Lagunitas-Forest Knolls
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Overnight | 54°F | Mostly Clear | 3 mph WNW | 0% |
| Saturday | 77°F | Patchy Fog then Sunny | 2 to 9 mph WNW | 0% |
| Saturday Night | 53°F | Mostly Cloudy | 5 to 8 mph WNW | 1% |
| Sunday | 70°F | Mostly Cloudy | 3 to 8 mph W | 1% |
| Sunday Night | 53°F | Mostly Cloudy then Patchy Fog | 2 to 7 mph W | 1% |
| Monday | 70°F | Patchy Fog then Mostly Sunny | 2 to 7 mph W | 0% |
| Monday Night | 54°F | Patchy Fog | 1 to 7 mph WSW | 0% |
| Tuesday | 73°F | Patchy Fog then Mostly Sunny | 1 to 7 mph WSW | 0% |
| Tuesday Night | 53°F | Areas Of Fog | 1 to 7 mph WNW | 0% |
| Wednesday | 82°F | Areas Of Fog then Sunny | 1 to 7 mph WNW | 0% |
| Wednesday Night | 57°F | Partly Cloudy | 1 to 7 mph NW | 0% |
| Thursday | 83°F | Sunny | 1 to 7 mph WNW | 0% |
| Thursday Night | 56°F | Partly Cloudy | 2 to 7 mph WNW | 0% |
| Friday | 76°F | Mostly Sunny | 3 to 8 mph W | 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 Sep 19, 2026.