Last frost date in Napa, California
February 12
Average last frost in spring. In an early year (1 in 10) it's over by January 3; in a late year (1 in 10) it comes after March 13.
December 4
Average first frost in fall. 1 year in 10 it comes by November 15.
A 32°F night happens here about 10 years in 10; in those years these are the usual dates.
Source: NOAA U.S. Climate Normals 1991–2020, station Napa State Hospital (USC00046074), 2.4 miles from Napa, elevation 35 ft. NOAA National Centers for Environmental Information. These are long-term averages, not a forecast.
| Early year | Average | Late year | |
|---|---|---|---|
| Last frost in spring | Jan 3 | Feb 12 | Mar 13 |
| First frost in fall | Nov 15 | Dec 4 | Jan 4 |
Frost-free days in an average year: 299
| Chance in a year | Average last in spring | Average first in fall | |
|---|---|---|---|
| Light frost (36°F) | Every year | Mar 27 | Nov 17 |
| Frost (32°F) | 10 years in 10 | Feb 12 | Dec 4 |
| Hard freeze (28°F) | 7 years in 10 | Jan 11 | Dec 19 |
Nights at 32°F or colder in an average year: 13
What to plant now in Napa
- Swiss chardJune 1 – Nov 1Now
- Celery and celeriac plantsAug 1 – Dec 1Now
- BeetsSept 1 – Dec 15Now
- Cabbage plantsSept 1 – Dec 31Now
- Chinese cabbageSept 1 – Nov 1Now
- Collards plantsSept 1 – Dec 1Now
- EndiveSept 1 – Nov 15Now
- Florence fennelSept 1 – Nov 15Now
- GarlicSept 1 – Nov 15Now
- Head lettuce plantsSept 1 – Dec 1Now
- KaleSept 1 – Dec 1Now
- KohlrabiSept 1 – Dec 1Now
- Leaf lettuceSept 1 – Dec 1Now
- LeeksSept 1 – Nov 1Now
- Mustard greensSept 1 – Dec 1Now
- Onion seedSept 1 – Nov 1Now
- ParsleySept 1 – Dec 31Now
- ParsnipsSept 1 – Nov 15Now
- RadishesSept 1 – Dec 31Now
- RutabagaSept 1 – Nov 15Now
- SorrelSept 1 – Nov 15Now
- TurnipsSept 1 – Nov 15Now
- CarrotsSept 15 – Dec 1Now
- DandelionSept 15 – Dec 15Now
- Corn saladOct 1 – Dec 31Now
- Garden peasOct 1 – Dec 31Now
- Onion plants plantsOct 1 – Dec 31Now
- SpinachOct 1 – Dec 31Now
- Upland cressOct 1 – Dec 31Now
- Chervil and chivesNov 1 – Dec 31Soon
- Onion setsNov 1 – Dec 31Soon
- Spring planting calendar for an average last frost around February 8 Napa: February 12
- Fall planting calendar for an average first frost around November 30 Napa: December 4
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
- American Canyon 9 mi · last frost Mar 5
- Sonoma 9 mi · last frost Mar 2
- Vallejo 13 mi · last frost Jan 17
- Fairfield 15 mi · last frost Jan 15
- Petaluma 18 mi · last frost Feb 28
Updated