Vallejo, CA Weather & Growing Conditions
Overnight
47°F
Mostly Clear
Mostly clear. Low around 47, with temperatures rising to around 49 overnight. East northeast wind around 5 mph.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Overnight | 47°F | Mostly Clear | 5 mph ENE | 0% |
| Wednesday | 67°F | Sunny | 2 to 7 mph NW | 2% |
| Wednesday Night | 47°F | Mostly Cloudy | 3 mph W | 2% |
| Thursday | 70°F | Patchy Fog then Mostly Sunny | 3 mph WSW | 0% |
| Thursday Night | 48°F | Mostly Clear | 1 mph WSW | 0% |
| Friday | 70°F | Mostly Sunny | 2 mph NE | 0% |
| Friday Night | 48°F | Mostly Clear | 1 mph NNE | 0% |
| Saturday | 72°F | Sunny | 0 to 6 mph NE | 0% |
| Saturday Night | 48°F | Mostly Clear | 1 mph NNW | 0% |
| Sunday | 71°F | Mostly Sunny | 2 mph NNW | 0% |
| Sunday Night | 50°F | Partly Cloudy | 1 mph NW | 0% |
| Monday | 69°F | Partly Sunny | 2 mph W | 2% |
| Monday Night | 49°F | Partly Cloudy | 1 mph NW | 2% |
| Tuesday | 70°F | Sunny | 2 mph WNW | 6% |
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 (4.3 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Nov 4, 2026.