Fairfield, CA Weather & Growing Conditions
Tonight
57°F
Clear
Clear, with a low around 57. West southwest wind 5 to 12 mph, with gusts as high as 20 mph.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Tonight | 57°F | Clear | 5 to 12 mph WSW | 0% |
| Saturday | 86°F | Sunny | 5 to 12 mph WSW | 0% |
| Saturday Night | 57°F | Partly Cloudy | 6 to 12 mph WSW | 0% |
| Sunday | 78°F | Partly Sunny | 6 to 10 mph WSW | 0% |
| Sunday Night | 56°F | Mostly Cloudy | 10 mph WSW | 0% |
| Monday | 79°F | Mostly Sunny | 8 to 13 mph WSW | 0% |
| Monday Night | 56°F | Mostly Clear | 8 to 13 mph WSW | 0% |
| Tuesday | 83°F | Sunny | 7 to 10 mph WSW | 0% |
| Tuesday Night | 57°F | Mostly Clear | 2 to 10 mph WSW | 0% |
| Wednesday | 92°F | Sunny | 1 to 6 mph WSW | 0% |
| Wednesday Night | 62°F | Mostly Clear | 2 to 6 mph W | 0% |
| Thursday | 92°F | Sunny | 2 to 9 mph W | 0% |
| Thursday Night | 62°F | Mostly Clear | 6 to 9 mph WSW | 0% |
| Friday | 86°F | Sunny | 7 to 12 mph WSW | 0% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for Fairfield, CA
Last spring frost
Jan 15
First fall frost
Dec 14
Growing season
336 days
Hardiness zone
9b
Explore more for Fairfield, CA: full frost dates · planting calendar · California frost dates
Climate data from the nearest NOAA station, Fairfield, Ca (3.5 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.