Last frost date in Grass Valley, California
April 10
Average last frost in spring. In an early year (1 in 10) it's over by March 17; in a late year (1 in 10) it comes after April 30.
November 13
Average first frost in fall. 1 year in 10 it comes by October 26.
Source: NOAA U.S. Climate Normals 1991–2020, station Grass Valley #2 (USC00043573), 1.4 miles from Grass Valley, elevation 2,400 ft. NOAA National Centers for Environmental Information. These are long-term averages, not a forecast.
| Early year | Average | Late year | |
|---|---|---|---|
| Last frost in spring | Mar 17 | Apr 10 | Apr 30 |
| First frost in fall | Oct 26 | Nov 13 | Dec 1 |
Frost-free days in an average year: 215
| Chance in a year | Average last in spring | Average first in fall | |
|---|---|---|---|
| Light frost (36°F) | Every year | Apr 28 | Oct 31 |
| Frost (32°F) | Every year | Apr 10 | Nov 13 |
| Hard freeze (28°F) | Every year | Mar 9 | Dec 1 |
Nights at 32°F or colder in an average year: 61
What to plant now in Grass Valley
- Mustard greensAug 15 – Nov 1Now
- Garden peasSept 1 – Nov 1Now
- ParsleySept 1 – Nov 15Now
- RadishesSept 1 – Nov 15Now
- SpinachSept 15 – Nov 1Now
- Corn saladOct 1 – Dec 1Now
- Onion setsOct 1 – Dec 1Now
- Upland cressOct 1 – Dec 1Now
- Asparagus plantsDec 1 – Jan 1Soon
- Spring planting calendar for an average last frost around April 10 Grass Valley: April 10
- Fall planting calendar for an average first frost around November 10 Grass Valley: November 13
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
- Rocklin 30 mi · last frost Feb 25
- Yuba City 32 mi · last frost Jan 15
- Oroville 33 mi · last frost Jan 30
- Roseville 34 mi · last frost Feb 22
- Placerville 36 mi · last frost Mar 31