Nicasio, CA Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Nicasio, a community in Marin County, California.
Today
82°F
Patchy Fog then Sunny
Patchy fog before 7am, then haze and patchy fog between 7am and 8am. Sunny. High near 82, with temperatures falling to around 77 in the afternoon. Southwest wind 2 to 9 mph.
7-day forecast for Nicasio
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 82°F | Patchy Fog then Sunny | 2 to 9 mph SW | 1% |
| Tonight | 52°F | Patchy Fog | 2 to 6 mph SW | 1% |
| Wednesday | 79°F | Patchy Fog then Mostly Sunny | 2 to 8 mph SW | 2% |
| Wednesday Night | 52°F | Areas Of Fog | 1 to 7 mph WSW | 0% |
| Thursday | 78°F | Areas Of Fog then Mostly Sunny | 1 to 8 mph WSW | 0% |
| Thursday Night | 52°F | Partly Cloudy then Patchy Fog | 1 to 8 mph W | 0% |
| Friday | 84°F | Patchy Fog then Sunny | 1 to 8 mph W | 0% |
| Friday Night | 54°F | Partly Cloudy | 0 to 8 mph WSW | 0% |
| Saturday | 82°F | Sunny | 0 to 8 mph WSW | 0% |
| Saturday Night | 56°F | Mostly Clear | 3 to 8 mph W | 0% |
| Sunday | 80°F | Sunny | 3 to 9 mph W | 0% |
| Sunday Night | 53°F | Mostly Clear | 3 to 9 mph WSW | 0% |
| Monday | 73°F | Sunny | 3 to 9 mph SW | 0% |
| Monday Night | 52°F | Partly Cloudy | 2 to 9 mph SW | 0% |
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 Aug 4, 2026.