Fairfax, CA Weather & Growing Conditions
Overnight
54°F
Mostly Clear
Mostly clear. Low around 54, with temperatures rising to around 57 overnight. South southwest wind around 3 mph.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Overnight | 54°F | Mostly Clear | 3 mph SSW | 0% |
| Tuesday | 91°F | Haze then Sunny | 3 to 7 mph SSW | 1% |
| Tuesday Night | 56°F | Mostly Clear | 3 to 7 mph SW | 2% |
| Wednesday | 84°F | Sunny | 3 to 7 mph SW | 3% |
| Wednesday Night | 56°F | Partly Cloudy | 2 to 7 mph WSW | 0% |
| Thursday | 82°F | Sunny | 1 to 7 mph WSW | 0% |
| Thursday Night | 56°F | Mostly Clear | 2 to 7 mph WSW | 0% |
| Friday | 88°F | Sunny | 1 to 7 mph WSW | 0% |
| Friday Night | 57°F | Mostly Clear | 2 to 7 mph WSW | 0% |
| Saturday | 86°F | Sunny | 1 to 7 mph WSW | 0% |
| Saturday Night | 60°F | Mostly Clear | 3 to 7 mph WSW | 0% |
| Sunday | 84°F | Sunny | 2 to 9 mph WSW | 0% |
| Sunday Night | 57°F | Mostly Clear | 5 to 9 mph WSW | 0% |
| Monday | 76°F | Sunny | 5 to 8 mph SW | 0% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for Fairfax, CA
Last spring frost
Jan 16
First fall frost
Dec 18
Growing season
334 days
Hardiness zone
10a
Explore more for Fairfax, CA: full frost dates · planting calendar · California frost dates
Climate data from the nearest NOAA station, Kentfield, Ca (4 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Aug 4, 2026.