When to plant in Livermore, CA
USDA Zone 9bLivermore, California frost dates, USDA zone, and a full-year planting calendar, drawn from the nearest NOAA station and tuned to the local season.
A generous ~290-day season lets Livermore gardeners direct-sow more and still ripen long-maturity crops like melons and winter squash. Zone 9b is warm enough that Livermore can grow subtropical perennials, and the short (or absent) frost period barely limits the annual calendar.
The average last spring frost in Livermore is now 6 days later than in the 1981–2010 normals. See how frost dates are shifting nationwide →
Frost probability
LIVERMORE · 1991–2020The date the last spring and first fall frost occur, by threshold and probability. A 90% date is later in spring — and earlier in fall — than a 10% date; the 50% · 32°F row is what most gardeners plan around. These are Livermore’s own odds, recorded at LIVERMORE.
| Threshold | SPRING 10% | SPRING 50% | SPRING 90% | FALL 10% | FALL 50% | FALL 90% |
|---|---|---|---|---|---|---|
| 36°F | Apr 13 | Mar 25 | Feb 26 | Nov 4 | Nov 18 | Dec 2 |
| 32°F | Mar 13 | Feb 15 | Jan 12 | Nov 16 | Dec 2 | Dec 28 |
| 28°F | Feb 10 | Jan 10 | Dec 19 | Nov 29 | Dec 18 | Jan 17 |
Download this table as CSV ↓ — every threshold and probability, plus this city’s planting-window dates.
What to plant now
TODAY · JULY 19Full-year planting calendar
Each bar is the exact window to take a planting action in Livermore, drawn to the day from the local frost dates. The dashed line is today.
Nearby weather stations
3 within 20 km · complete 32°F normalsWhen stations disagree by more than a few days, that spread is real microclimate variation — elevation, water, urban heat. Judge which station best matches your own yard.
Livermore planting FAQ
When is the last spring frost in Livermore, CA?
On average, the last spring frost in Livermore is around February 15 (50% probability at 32°F, from 1991–2020 NOAA normals). Wait until after this date to set out tender plants like tomatoes and peppers.
When is the first fall frost in Livermore, CA?
In Livermore, the first 32°F freeze of fall lands around December 2 on average. Time your last harvests and any season-extension cover before it.
What hardiness zone is Livermore in?
Livermore is in USDA hardiness zone 9b. In zone 9b, winters are mild — many tender perennials overwinter here.
How long is the growing season in Livermore?
There are roughly 290 frost-free days in Livermore (a long growing season), running from the average last frost around February 15 to the first fall frost near December 2.
When should I plant tomatoes in Livermore?
In Livermore, start tomato seeds indoors around December 21–January 4, then transplant seedlings outdoors around February 22 once the danger of frost has passed.
Never miss a window in Livermore
An email when it’s time to start seeds, transplant, and sow — timed to Livermore’s frost dates. Double opt-in, one-click unsubscribe, no spam.
Nearby cities
8 within reach- Pleasanton · 11 km
- Dublin · 12 km
- San Ramon · 17 km
- Blackhawk · 19 km
- Mountain House · 22 km
- Danville · 23 km
- Union City · 25 km
- Fairview · 25 km
Frost dates recorded at LIVERMORE, 5 km from the city center · 1991–2020 NOAA climate normals · zone from the USDA/PRISM 2023 map. How we compute this.
BlissGarden. "When to Plant in Livermore, CA — Frost Dates & Zone 9b." Frost normals: NOAA NCEI U.S. Climate Normals 1991–2020, station USC00044997. Retrieved from https://blissgarden.com/california/livermore.