Lucas Valley-Marinwood, CA Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Lucas Valley-Marinwood, a community in Marin County, California.
Overnight
55°F
Clear
Clear. Low around 55, with temperatures rising to around 57 overnight. South southwest wind around 5 mph.
7-day forecast for Lucas Valley-Marinwood
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Overnight | 55°F | Clear | 5 mph SSW | 0% |
| Tuesday | 93°F | Haze then Sunny | 3 to 7 mph SSW | 1% |
| Tuesday Night | 55°F | Mostly Clear | 3 to 7 mph WSW | 1% |
| Wednesday | 84°F | Sunny | 3 to 7 mph SW | 1% |
| Wednesday Night | 55°F | Mostly Clear | 3 to 7 mph WSW | 0% |
| Thursday | 81°F | Sunny | 2 to 7 mph WSW | 0% |
| Thursday Night | 56°F | Mostly Clear | 3 to 7 mph WSW | 0% |
| Friday | 87°F | Sunny | 1 to 7 mph WSW | 0% |
| Friday Night | 56°F | Mostly Clear | 1 to 7 mph WSW | 0% |
| Saturday | 87°F | Sunny | 1 to 7 mph SW | 0% |
| Saturday Night | 58°F | Mostly Clear | 2 to 7 mph WSW | 0% |
| Sunday | 85°F | Sunny | 2 to 8 mph SW | 0% |
| Sunday Night | 56°F | Mostly Clear | 3 to 8 mph SW | 0% |
| Monday | 78°F | Sunny | 3 to 8 mph SW | 0% |
Forecast source: National Weather Service (api.weather.gov) for Lucas Valley-Marinwood (38.041, -122.576). Updated through the day.
Growing snapshot for Lucas Valley-Marinwood
Last spring frost
Jan 11
First fall frost
Dec 21
Growing season
349 days
Hardiness zone
9b
More local growing data for Lucas Valley-Marinwood: nearby ZIP 94903 weather · frost dates · planting calendar · California frost dates
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Climate data from the nearest NOAA station, San Rafael Civic Ctr, Ca (2 mi from Lucas Valley-Marinwood). Frost dates are 1991–2020 averages, not a forecast. Page updated Aug 4, 2026.