Nicasio, CA Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Nicasio, a community in Marin County, California.
Overnight
47°F
Chance Light Rain
A chance of rain before 4am. Partly cloudy. Low around 47, with temperatures rising to around 49 overnight. East wind around 5 mph. Chance of precipitation is 30%.
7-day forecast for Nicasio
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Overnight | 47°F | Chance Light Rain | 5 mph E | 25% |
| Wednesday | 65°F | Sunny | 2 to 12 mph N | 2% |
| Wednesday Night | 48°F | Mostly Cloudy | 3 to 10 mph NW | 2% |
| Thursday | 70°F | Mostly Sunny | 2 to 6 mph NW | 0% |
| Thursday Night | 46°F | Mostly Clear | 1 to 6 mph NW | 0% |
| Friday | 72°F | Sunny | 1 to 5 mph N | 0% |
| Friday Night | 48°F | Mostly Clear | 0 to 5 mph NNW | 0% |
| Saturday | 73°F | Sunny | 1 to 5 mph NE | 0% |
| Saturday Night | 48°F | Mostly Clear | 5 mph NW | 0% |
| Sunday | 71°F | Mostly Sunny | 2 to 6 mph NW | 0% |
| Sunday Night | 50°F | Partly Cloudy | 1 to 6 mph NW | 0% |
| Monday | 70°F | Partly Sunny | 2 to 7 mph WNW | 2% |
| Monday Night | 50°F | Partly Cloudy | 1 to 7 mph WNW | 2% |
| Tuesday | 70°F | Sunny | 1 to 6 mph NW | 8% |
Forecast source: National Weather Service (api.weather.gov) for Nicasio (38.061, -122.701). Updated through the day.
Growing snapshot for Nicasio
Last spring frost
Jan 11
First fall frost
Dec 21
Growing season
349 days
Hardiness zone
9b
More local growing data for Nicasio: nearby ZIP 94946 weather · frost dates · planting calendar · California frost dates
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Climate data from the nearest NOAA station, San Rafael Civic Ctr, Ca (10.1 mi from Nicasio). Frost dates are 1991–2020 averages, not a forecast. Page updated Nov 4, 2026.