Frost dates for Vallejo, California
In a typical year, Vallejo’s last spring frost lands around Jan 17 and the first fall frost around Dec 27, a growing season of about 344 days. These are odds drawn from 30-year NOAA climate normals, not a promise. USDA zone 9b.
Right now the growing season is open, with about 63 days until the typical first fall frost.
| Odds | Last spring frost | First fall frost |
|---|---|---|
| 10 percent | Dec 23 | Dec 4 |
| 50 percent | Jan 17 | Dec 27 |
| 90 percent | Mar 4 | Feb 4 |
A 10 percent year is an early year, a 90 percent year a late one. Frost-sensitive planting usually waits for the 90 percent side of the last-frost band.
Soil in Vallejo is typically around 65°F at 4 inches this time of year, estimated from the last two weeks of normal air temperatures.
Plantable now in Vallejo
- Radish (Cherry Belle)
- Lettuce (Buttercrunch)
- Beet (Detroit Dark Red)
- Spinach (Space)
- Swiss chard (Bright Lights)
- Kale (Lacinato)
- Pea (Sugar Ann)
- Dill (Bouquet)
Timing comes from the same temperature engine the app uses, run against Vallejo’s normals for today.
Common questions
When is the last frost in Vallejo, California?
Vallejo’s last spring frost falls around January 17 in a typical year. One year in ten it is done by December 23, and one year in ten frost holds on until March 4. Frost-sensitive planting usually waits for the late side of that band.
When is the first fall frost in Vallejo?
The first fall frost arrives around December 27 in a typical year, as early as December 4 in an early year and as late as February 4 in a late one.
How long is the growing season in Vallejo?
About 344 days, counted between the typical last spring frost and the typical first fall frost.
What USDA zone is Vallejo in?
Vallejo is in USDA hardiness zone 9b under the 2023 USDA Plant Hardiness Zone Map.
Dates come from 30-year NOAA climate normals for the nearest reporting station. They describe odds, not a forecast.
Nearby cities
- Richmond, CA (around Jan 4 to Jan 2)
- Concord, CA (around Jan 9 to Dec 14)
- Fairfield, CA (around Jan 15 to Dec 14)
- Berkeley, CA (around Jan 3 to Jan 1)
- Oakland, CA (around Jan 3 to Jan 1)
Row & Bed is a plant reference built around your garden: your zone, your frost dates, your forecast, and a cited page for every variety in your beds.
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