Fairfield, CA Weather & Growing Conditions
Overnight
48°F
Mostly Clear
Mostly clear. Low around 48, with temperatures rising to around 50 overnight. North wind around 14 mph, with gusts as high as 24 mph.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Overnight | 48°F | Mostly Clear | 14 mph N | 0% |
| Wednesday | 69°F | Sunny | 5 to 13 mph NNW | 2% |
| Wednesday Night | 47°F | Mostly Cloudy | 3 mph W | 2% |
| Thursday | 72°F | Mostly Sunny | 2 to 7 mph NNW | 0% |
| Thursday Night | 47°F | Mostly Clear | 0 to 3 mph NW | 0% |
| Friday | 71°F | Sunny | 0 to 3 mph NE | 0% |
| Friday Night | 48°F | Mostly Clear | 1 mph ENE | 0% |
| Saturday | 72°F | Sunny | 0 to 6 mph NE | 0% |
| Saturday Night | 49°F | Mostly Clear | 1 mph NNE | 0% |
| Sunday | 73°F | Sunny | 3 mph NW | 0% |
| Sunday Night | 49°F | Partly Cloudy | 1 mph SW | 0% |
| Monday | 71°F | Mostly Sunny | 0 to 3 mph WSW | 0% |
| Monday Night | 49°F | Partly Cloudy | 1 mph WNW | 2% |
| Tuesday | 71°F | Sunny | 2 mph NNW | 6% |
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 (7.1 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Nov 4, 2026.