When to plant in Fremont, CA
USDA Zone 10aHere are the average frost dates, USDA hardiness zone, and a month-by-month planting calendar for Fremont, California — all computed from Fremont's nearest NOAA weather station.
A generous ~360-day season lets Fremont gardeners direct-sow more and still ripen long-maturity crops like melons and winter squash. In zone 10a, frost is a minor factor for Fremont — most perennials thrive, and annual vegetables can go out early and stay late.
Frost probability
NEWARK · 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 Fremont’s own odds, recorded at NEWARK.
| Threshold | SPRING 10% | SPRING 50% | SPRING 90% | FALL 10% | FALL 50% | FALL 90% |
|---|---|---|---|---|---|---|
| 36°F | Feb 28 | Jan 19 | Dec 24 | Nov 27 | Dec 15 | Jan 9 |
| 32°F | Jan 22 | Jan 1 | Dec 16 | Dec 9 | Dec 27 | Jan 14 |
Download this table as CSV ↓ — every threshold and probability, plus this city’s planting-window dates.
What to plant now
TODAY · JULY 19Nothing new to sow or transplant outdoors in the next few weeks — a seasonal lull. Check the full-year calendar below for the next window.
Full-year planting calendar
Each bar is the exact window to take a planting action in Fremont, drawn to the day from the local frost dates. The dashed line is today.
Nearby weather stations
3 within 14 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.
Fremont planting FAQ
When is the last spring frost in Fremont, CA?
Plan for the last spring frost in Fremont around January 1 (the date it has a 50% chance of a 32°F freeze). Anything frost-sensitive should go out after it.
When is the first fall frost in Fremont, CA?
The first fall frost in Fremont typically arrives around December 27 (50% probability at 32°F). Harvest or protect frost-sensitive crops before then.
What hardiness zone is Fremont in?
Fremont is in USDA hardiness zone 10a. In zone 10a, winters are mild — many tender perennials overwinter here.
How long is the growing season in Fremont?
Fremont has about 360 frost-free days — a long growing season — between the average last spring frost (January 1) and first fall frost (December 27).
When should I plant tomatoes in Fremont?
For Fremont, sow tomatoes indoors about November 6–November 20 and move the seedlings out around January 8, after the last spring frost.
Never miss a window in Fremont
An email when it’s time to start seeds, transplant, and sow — timed to Fremont’s frost dates. Double opt-in, one-click unsubscribe, no spam.
Nearby cities
8 within reach- Newark · 8 km
- Milpitas · 8 km
- Union City · 14 km
- Sunnyvale · 14 km
- Santa Clara · 15 km
- Mountain View · 16 km
- East Palo Alto · 17 km
- Alum Rock · 17 km
Frost dates recorded at NEWARK, 8 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 Fremont, CA — Frost Dates & Zone 10a." Frost normals: NOAA NCEI U.S. Climate Normals 1991–2020, station USC00046144. Retrieved from https://blissgarden.com/california/fremont.