Fairfield, CA Weather & Growing Conditions
Overnight
49°F
Mostly Clear
Mostly clear. Low around 49, with temperatures rising to around 51 overnight. North wind around 8 mph, with gusts as high as 20 mph.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Overnight | 49°F | Mostly Clear | 8 mph N | 0% |
| Wednesday | 68°F | Sunny | 8 mph NW | 2% |
| Wednesday Night | 48°F | Mostly Cloudy | 1 to 5 mph WNW | 2% |
| Thursday | 71°F | Mostly Sunny | 1 to 6 mph NW | 0% |
| Thursday Night | 49°F | Mostly Clear | 0 to 3 mph WNW | 0% |
| Friday | 71°F | Sunny | 0 to 3 mph ENE | 0% |
| Friday Night | 50°F | Mostly Clear | 2 mph WNW | 0% |
| Saturday | 73°F | Sunny | 0 to 8 mph ENE | 0% |
| Saturday Night | 50°F | Mostly Clear | 1 mph NNW | 0% |
| Sunday | 72°F | Sunny | 3 mph NW | 0% |
| Sunday Night | 51°F | Partly Cloudy | 2 mph WNW | 0% |
| Monday | 70°F | Mostly Sunny | 1 to 5 mph W | 2% |
| Monday Night | 50°F | Partly Cloudy | 3 mph WNW | 2% |
| Tuesday | 71°F | Sunny | 1 to 5 mph WNW | 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 (3.5 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Nov 4, 2026.