Frost dates for Corona, California
In a typical year, Corona’s last spring frost lands around Jan 17 and the first fall frost around Dec 19, a growing season of about 336 days. These are odds drawn from 30-year NOAA climate normals, not a promise. USDA zone 10a.
Right now the growing season is open, with about 55 days until the typical first fall frost.
| Odds | Last spring frost | First fall frost |
|---|---|---|
| 10 percent | Dec 18 | Nov 27 |
| 50 percent | Jan 17 | Dec 19 |
| 90 percent | Feb 22 | Jan 17 |
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 Corona is typically around 67°F at 4 inches this time of year, estimated from the last two weeks of normal air temperatures.
Plantable now in Corona
- Radish (Cherry Belle)
- Lettuce (Buttercrunch)
- Spinach (Space)
- Swiss chard (Bright Lights)
- Bok choy (Joi Choi)
- Dill (Bouquet)
- Beet (Chioggia)
- Turnip (Purple Top White Globe)
Timing comes from the same temperature engine the app uses, run against Corona’s normals for today.
Common questions
When is the last frost in Corona, California?
Corona’s last spring frost falls around January 17 in a typical year. One year in ten it is done by December 18, and one year in ten frost holds on until February 22. Frost-sensitive planting usually waits for the late side of that band.
When is the first fall frost in Corona?
The first fall frost arrives around December 19 in a typical year, as early as November 27 in an early year and as late as January 17 in a late one.
How long is the growing season in Corona?
About 336 days, counted between the typical last spring frost and the typical first fall frost.
What USDA zone is Corona in?
Corona is in USDA hardiness zone 10a 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
- Riverside, CA (around Jan 9 to Dec 25)
- Ontario, CA (around Jan 4 to Dec 30)
- Fontana, CA (around Jan 9 to Dec 30)
- Pomona, CA (around Jan 8 to Dec 28)
- Orange, CA (around Jan 5 to Dec 25)
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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