Last frost date in Pomona, California
January 8
Average last frost in spring. In an early year (1 in 10) it's over by December 14; in a late year (1 in 10) it comes after February 18.
December 28
Average first frost in fall. 1 year in 10 it comes by December 5.
A 32°F night happens here about 7 years in 10; in those years these are the usual dates.
Source: NOAA U.S. Climate Normals 1991–2020, station Pomona/fairplex (USC00047050), 1.6 miles from Pomona, elevation 999 ft. NOAA National Centers for Environmental Information. These are long-term averages, not a forecast.
This station is also the nearest one for Azusa, Brea, Claremont, Covina, Diamond Bar, Glendora, La Verne, Montclair, San Dimas, Walnut and West Covina, so their frost dates are the same as Pomona's.
| Early year | Average | Late year | |
|---|---|---|---|
| Last frost in spring | Dec 14 | Jan 8 | Feb 18 |
| First frost in fall | Dec 5 | Dec 28 | Feb 2 |
Frost-free days in an average year: 354
| Chance in a year | Average last in spring | Average first in fall | |
|---|---|---|---|
| Light frost (36°F) | 10 years in 10 | Feb 8 | Dec 10 |
| Frost (32°F) | 7 years in 10 | Jan 8 | Dec 28 |
| Hard freeze (28°F) | 1 years in 10 | — | — |
Nights at 32°F or colder in an average year: 2.7
What to plant now in Pomona
- Swiss chardJune 1 – Dec 31Now
- BeetsSept 1 – Dec 31Now
- Broccoli plantsSept 1 – Dec 31Now
- Brussels sprouts plantsSept 1 – Dec 31Now
- Cabbage plantsSept 1 – Dec 31Now
- Chinese cabbageSept 1 – Dec 1Now
- Collards plantsSept 1 – Dec 31Now
- EndiveSept 1 – Dec 31Now
- Florence fennelSept 1 – Dec 1Now
- KaleSept 1 – Dec 31Now
- KohlrabiSept 1 – Dec 31Now
- ParsleySept 1 – Dec 31Now
- ParsnipsSept 1 – Dec 1Now
- SalsifySept 1 – Oct 31Now
- Snap beansSept 1 – Nov 1Now
- SorrelSept 1 – Dec 31Now
- TomatoesSept 1 – Nov 1Now
- CarrotsSept 15 – Dec 1Now
- Cauliflower plantsSept 15 – Nov 1Now
- GarlicSept 15 – Nov 15Now
- Head lettuce plantsSept 15 – Dec 31Now
- Leaf lettuceSept 15 – Dec 31Now
- LeeksSept 15 – Nov 1Now
- Mustard greensSept 15 – Dec 1Now
- Onion seedSept 15 – Nov 1Now
- ShallotsSept 15 – Nov 1Now
- Celery and celeriac plantsOct 1 – Dec 31Now
- Corn saladOct 1 – Dec 31Now
- DandelionOct 1 – Dec 31Now
- Garden peasOct 1 – Dec 31Now
- Onion plants plantsOct 1 – Dec 31Now
- RadishesOct 1 – Dec 31Now
- SpinachOct 1 – Dec 31Now
- TurnipsOct 1 – Dec 31Now
- Upland cressOct 1 – Dec 31Now
- RutabagaOct 15 – Nov 15Now
- Chervil and chivesNov 1 – Dec 31Soon
- Onion setsNov 1 – Dec 31Soon
- Fall planting calendar for an average first frost around December 20 Pomona: December 28
Planting dates: USDA Home and Garden Bulletin No. 9 (1967), “Suburban and Farm Vegetable Gardens,” tables 4 and 5. How we match the table.
Nearby in California
- Anaheim 14 mi · last frost Jan 5
- Monrovia 15 mi · last frost Apr 28
- El Monte 15 mi · last frost Jan 4
- Jurupa Valley 17 mi · last frost Jan 9
- Fontana 17 mi · last frost Jan 4