Last frost date in San Ramon, California
March 8
Average last frost in spring. In an early year (1 in 10) it's over by January 12; in a late year (1 in 10) it comes after April 15.
December 22
Average first frost in fall. 1 year in 10 it comes by November 23.
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 Mt Diablo Junction (USC00045915), 7.9 miles from San Ramon, elevation 2,170 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 12 | Mar 8 | Apr 15 |
| First frost in fall | Nov 23 | Dec 22 | Feb 11 |
An early or late year is one in 10: 1 year in 10 the frost comes before the early date, and 1 year in 10 after the late date.
Frost-free days in an average year: 282
Planting calendar for San Ramon
Fall planting
USDA dates for places whose average first freeze is about December 20 (San Ramon: December 22).
- SoybeansJune 1 – July 30 (past for this year)
- Summer squashJune 1 – Oct 1 (past for this year)
- Sweet potatoesJune 1 – July 1 (past for this year)
- Swiss chardJune 1 – Dec 31Now
- Black-eyed peasJuly 1 – Sept 20 (past for this year)
- Eggplant plantsAug 1 – Sept 30 (past for this year)
- OkraAug 1 – Oct 1 (past for this year)
- PotatoesAug 1 – Sept 15 (past for this year)
- Winter squashAug 1 – Sept 1 (past for this year)
- CucumbersAug 15 – Oct 1 (past for this year)
- Peppers plantsAug 15 – Oct 1 (past for this year)
- Witloof chicoryAug 15 – Oct 15 (past for this year)
- 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
- Lima beansSept 1 – Oct 1 (past for this year)
- 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
USDA lists horseradish as generally spring-planted here.
Spring planting
USDA dates for places whose average last freeze is about March 10 (San Ramon: March 8).
- Asparagus plantsJan 1 – Mar 1
- Corn saladJan 1 – Mar 15
- RadishesJan 1 – Apr 15
- Garden peasJan 15 – Mar 15
- Leaf lettuceJan 15 – Apr 1
- Onion plants plantsJan 15 – Feb 15
- Onion setsJan 15 – Mar 10
- ParsnipsJan 15 – Mar 1
- RutabagaJan 15 – Feb 15
- ShallotsJan 15 – Mar 1
- SpinachJan 15 – Mar 10
- Cabbage plantsJan 25 – Mar 1
- LeeksJan 25 – Mar 1
- Cauliflower plantsFeb 1 – Mar 1
- Chervil and chivesFeb 1 – Mar 1
- Collards plantsFeb 1 – Apr 1
- DandelionFeb 1 – Mar 1
- Head lettuce plantsFeb 1 – 20
- Onion seedFeb 1 – Mar 1
- ParsleyFeb 1 – Mar 10
- PotatoesFeb 1 – Mar 1
- SalsifyFeb 1 – Mar 1
- TurnipsFeb 1 – Mar 1
- CarrotsFeb 10 – Mar 15
- KaleFeb 10 – Mar 1
- KohlrabiFeb 10 – Mar 1
- Mustard greensFeb 10 – Mar 15
- SorrelFeb 10 – Mar 15
- Upland cressFeb 10 – Mar 15
- BeetsFeb 15 – June 1
- Broccoli plantsFeb 15 – Mar 15
- Brussels sprouts plantsFeb 15 – Mar 15
- EndiveFeb 15 – Mar 15
- Florence fennelFeb 15 – Mar 15
- Swiss chardFeb 15 – May 15
- Celery and celeriac plantsFeb 20 – Mar 20
- Sweet cornMar 10 – Apr 15
- Black-eyed peasMar 15 – July 1
- Cantaloupe (muskmelon)Mar 15 – Apr 15
- CucumbersMar 15 – Apr 15
- Eggplant plantsMar 15 – Apr 15
- Snap beansMar 15 – May 15
- Summer squashMar 15 – May 1
- WatermelonMar 15 – Apr 15
- Lima beansMar 20 – June 1
- New Zealand spinachMar 20 – May 15
- OkraMar 20 – June 1
- TomatoesMar 20 – May 10
- Peppers plantsApr 1 – June 1
- Sweet potatoesApr 1 – June 1
- SoybeansApr 10 – June 30
- Witloof chicoryJune 1 – July 1
USDA lists chinese cabbage, garlic as generally fall-planted here.
Planting dates: USDA Home and Garden Bulletin No. 9 (1967), “Suburban and Farm Vegetable Gardens,” tables 4 and 5 (earliest safe spring and latest safe fall dates), applied to this place's NOAA frost dates. “Plants” means setting out transplants, not sowing seed. How we match the table.
Nearby in California
- Danville 4 mi · last frost Mar 8
- Dublin 4 mi · last frost Feb 15
- Pleasanton 7 mi · last frost Feb 15
- Livermore 11 mi · last frost Feb 15
- Walnut Creek 11 mi · last frost Jan 7