Nicasio, CA Weather & Growing Conditions
This Afternoon
79°F
Sunny
Sunny. High near 79, with temperatures falling to around 71 in the afternoon. West wind around 10 mph, with gusts as high as 20 mph.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 79°F | Sunny | 10 mph W | 0% |
| Tonight | 53°F | Mostly Cloudy | 3 to 9 mph W | 1% |
| Sunday | 71°F | Mostly Cloudy | 2 to 9 mph WSW | 0% |
| Sunday Night | 53°F | Mostly Cloudy then Patchy Fog | 2 to 7 mph WSW | 0% |
| Monday | 71°F | Patchy Fog then Mostly Sunny | 2 to 9 mph WSW | 1% |
| Monday Night | 53°F | Partly Cloudy then Areas Of Fog | 1 to 9 mph WSW | 1% |
| Tuesday | 73°F | Areas Of Fog then Mostly Sunny | 1 to 9 mph WSW | 0% |
| Tuesday Night | 52°F | Areas Of Fog | 0 to 9 mph NW | 0% |
| Wednesday | 84°F | Areas Of Fog then Mostly Sunny | 0 to 8 mph NW | 0% |
| Wednesday Night | 56°F | Partly Cloudy | 0 to 8 mph NW | 0% |
| Thursday | 86°F | Mostly Sunny | 0 to 9 mph WNW | 0% |
| Thursday Night | 57°F | Partly Cloudy | 2 to 9 mph W | 0% |
| Friday | 79°F | Mostly Sunny | 2 to 9 mph W | 0% |
| Friday Night | 54°F | Partly Cloudy | 2 to 9 mph W | 1% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for Nicasio, CA
Last spring frost
Jan 11
First fall frost
Dec 21
Growing season
349 days
Hardiness zone
9b
Explore more for Nicasio, CA: full frost dates · planting calendar · California frost dates
Climate data from the nearest NOAA station, San Rafael Civic Ctr, Ca (10.1 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 20, 2026.