Nicasio, CA Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Nicasio, a community in Marin County, California.
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 for Nicasio
| 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) 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
Nearby towns & communities
Alto
Belvedere
Black Point-Green Point
Bolinas
Corte Madera
Dillon Beach
Fairfax
Inverness
Kentfield
Lagunitas-Forest Knolls
Larkspur
Lucas Valley-Marinwood
Marin City
Mill Valley
Muir Beach
Novato
Petaluma Center
Point Reyes Station
Ross
San Anselmo
San Francisco
San Geronimo
San Rafael
Santa Venetia
Sausalito
Sleepy Hollow
Stinson Beach
Strawberry
Tamalpais-Homestead Valley
Tiburon
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 Sep 20, 2026.