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
54°F
Mostly Clear
Mostly clear, with a low around 54. West wind around 2 mph.
7-day forecast for Lucas Valley-Marinwood
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Overnight | 54°F | Mostly Clear | 2 mph W | 0% |
| Saturday | 82°F | Sunny | 1 to 8 mph SW | 0% |
| Saturday Night | 54°F | Partly Cloudy | 3 to 8 mph W | 0% |
| Sunday | 73°F | Mostly Cloudy | 5 mph WSW | 1% |
| Sunday Night | 54°F | Mostly Cloudy | 6 mph WSW | 1% |
| Monday | 73°F | Mostly Sunny | 2 to 7 mph SW | 0% |
| Monday Night | 55°F | Partly Cloudy | 2 to 7 mph SW | 0% |
| Tuesday | 76°F | Mostly Sunny | 2 to 6 mph SW | 0% |
| Tuesday Night | 54°F | Mostly Clear | 0 to 6 mph SW | 0% |
| Wednesday | 89°F | Sunny | 0 to 3 mph W | 0% |
| Wednesday Night | 58°F | Mostly Clear | 0 to 3 mph W | 0% |
| Thursday | 90°F | Sunny | 0 to 5 mph SW | 0% |
| Thursday Night | 58°F | Mostly Clear | 1 to 5 mph WSW | 0% |
| Friday | 82°F | Sunny | 1 to 6 mph WSW | 1% |
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
Nearby towns & communities
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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 Sep 19, 2026.