Vallejo, CA Weather & Growing Conditions
Overnight
48°F
Partly Cloudy
Partly cloudy. Low around 48, with temperatures rising to around 50 overnight. East northeast wind around 7 mph.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Overnight | 48°F | Partly Cloudy | 7 mph ENE | 0% |
| Wednesday | 65°F | Sunny | 3 to 8 mph NW | 2% |
| Wednesday Night | 48°F | Mostly Cloudy | 5 mph WNW | 2% |
| Thursday | 68°F | Mostly Sunny | 5 mph WNW | 0% |
| Thursday Night | 49°F | Mostly Clear | 0 to 3 mph W | 0% |
| Friday | 68°F | Mostly Sunny | 3 mph NE | 0% |
| Friday Night | 49°F | Mostly Clear | 2 mph N | 0% |
| Saturday | 70°F | Sunny | 2 to 8 mph E | 0% |
| Saturday Night | 49°F | Mostly Clear | 2 mph N | 0% |
| Sunday | 69°F | Mostly Sunny | 5 mph NW | 0% |
| Sunday Night | 51°F | Partly Cloudy | 2 mph W | 0% |
| Monday | 68°F | Partly Sunny | 5 mph WSW | 2% |
| Monday Night | 49°F | Partly Cloudy | 0 to 3 mph WNW | 2% |
| Tuesday | 68°F | Mostly Sunny | 5 mph WNW | 5% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for Vallejo, CA
Last spring frost
Jan 17
First fall frost
Dec 27
Growing season
346 days
Hardiness zone
9b
Explore more for Vallejo, CA: full frost dates · planting calendar · California frost dates
Climate data from the nearest NOAA station, Vallejo, Ca (2 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Nov 4, 2026.