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
48°F
Chance Light Rain
A chance of rain before 4am. Partly cloudy. Low around 48, with temperatures rising to around 50 overnight. East wind around 5 mph. Chance of precipitation is 30%. New rainfall amounts less than a tenth of an inch possible.
7-day forecast for Lagunitas-Forest Knolls
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Overnight | 48°F | Chance Light Rain | 5 mph E | 25% |
| Wednesday | 64°F | Sunny | 2 to 9 mph N | 2% |
| Wednesday Night | 50°F | Mostly Cloudy | 3 to 9 mph NW | 2% |
| Thursday | 69°F | Mostly Sunny | 6 mph NW | 0% |
| Thursday Night | 48°F | Mostly Clear | 1 to 5 mph NNW | 0% |
| Friday | 70°F | Sunny | 1 to 5 mph N | 0% |
| Friday Night | 49°F | Mostly Clear | 0 to 5 mph NNW | 0% |
| Saturday | 72°F | Sunny | 1 to 5 mph NE | 0% |
| Saturday Night | 49°F | Mostly Clear | 5 mph NW | 0% |
| Sunday | 69°F | Mostly Sunny | 5 mph NNW | 0% |
| Sunday Night | 51°F | Partly Cloudy | 5 mph NW | 0% |
| Monday | 67°F | Mostly Sunny | 2 to 6 mph NW | 2% |
| Monday Night | 50°F | Partly Cloudy | 2 to 6 mph NW | 2% |
| Tuesday | 67°F | Sunny | 5 mph NNW | 8% |
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 Nov 4, 2026.