Fairfax, CA Weather & Growing Conditions
This Afternoon
82°F
Sunny
Sunny. High near 82, with temperatures falling to around 75 in the afternoon. West northwest wind 3 to 9 mph, with gusts as high as 18 mph.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 82°F | Sunny | 3 to 9 mph WNW | 0% |
| Tonight | 54°F | Partly Cloudy | 5 to 9 mph WNW | 0% |
| Sunday | 72°F | Partly Sunny | 2 to 7 mph W | 0% |
| Sunday Night | 54°F | Mostly Cloudy | 3 to 7 mph W | 0% |
| Monday | 70°F | Mostly Sunny | 2 to 8 mph WSW | 1% |
| Monday Night | 55°F | Partly Cloudy | 2 to 8 mph WSW | 1% |
| Tuesday | 73°F | Mostly Sunny | 1 to 7 mph WSW | 0% |
| Tuesday Night | 54°F | Mostly Clear | 0 to 7 mph W | 0% |
| Wednesday | 87°F | Sunny | 0 to 7 mph W | 0% |
| Wednesday Night | 58°F | Mostly Clear | 0 to 7 mph WNW | 0% |
| Thursday | 88°F | Sunny | 0 to 7 mph W | 0% |
| Thursday Night | 59°F | Mostly Clear | 3 to 7 mph W | 0% |
| Friday | 81°F | Mostly Sunny | 2 to 9 mph W | 0% |
| Friday Night | 56°F | Mostly Clear | 3 to 9 mph W | 1% |
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 Sep 19, 2026.