Fairfax, CA Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Fairfax, a town in Marin County, California.
Today
94°F
Sunny
Sunny. High near 94, with temperatures falling to around 89 in the afternoon. South southwest wind 2 to 7 mph.
7-day forecast for Fairfax
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 94°F | Sunny | 2 to 7 mph SSW | 1% |
| Tonight | 54°F | Mostly Clear then Patchy Fog | 2 to 7 mph WSW | 1% |
| Wednesday | 85°F | Patchy Fog then Sunny | 2 to 7 mph SW | 2% |
| Wednesday Night | 54°F | Mostly Clear then Patchy Fog | 1 to 7 mph WSW | 0% |
| Thursday | 83°F | Sunny | 1 to 7 mph WSW | 0% |
| Thursday Night | 55°F | Mostly Clear | 1 to 7 mph WSW | 0% |
| Friday | 89°F | Sunny | 0 to 7 mph SW | 0% |
| Friday Night | 56°F | Mostly Clear | 1 to 7 mph WSW | 0% |
| Saturday | 87°F | Sunny | 1 to 7 mph SW | 0% |
| Saturday Night | 58°F | Mostly Clear | 3 to 7 mph WSW | 0% |
| Sunday | 85°F | Sunny | 2 to 9 mph WSW | 0% |
| Sunday Night | 55°F | Mostly Clear | 5 to 9 mph WSW | 0% |
| Monday | 77°F | Sunny | 5 to 8 mph SW | 0% |
| Monday Night | 54°F | Mostly Clear | 3 to 8 mph SW | 0% |
Forecast source: National Weather Service (api.weather.gov) for Fairfax (37.989, -122.595). Updated through the day.
Growing snapshot for Fairfax
Last spring frost
Jan 11
First fall frost
Dec 21
Growing season
349 days
Hardiness zone
9b
More local growing data for Fairfax: nearby ZIP 94960 weather · frost dates · planting calendar · California frost dates
Nearby towns & communities
Alto
Belvedere
Black Point-Green Point
Bolinas
Corte Madera
Dillon Beach
Inverness
Kentfield
Lagunitas-Forest Knolls
Larkspur
Lucas Valley-Marinwood
Marin City
Mill Valley
Muir Beach
Nicasio
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 (2.2 mi from Fairfax). Frost dates are 1991–2020 averages, not a forecast. Page updated Aug 4, 2026.