When to plant in West Whittier-Los Nietos, CA
USDA Zone 10bEverything below — frost dates, hardiness zone, and what to plant when in West Whittier-Los Nietos, California — is derived from the closest NOAA station with complete climate normals.
A ~-2-day frost-free window makes West Whittier-Los Nietos a short-season garden: choose early varieties and start long-season crops indoors well ahead of the last frost. In zone 10b, frost is a minor factor for West Whittier-Los Nietos — most perennials thrive, and annual vegetables can go out early and stay late.
Frost probability
SAN GABRIEL FIRE DEPT · 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 West Whittier-Los Nietos’s own odds, recorded at SAN GABRIEL FIRE DEPT.
| Threshold | SPRING 10% | SPRING 50% | SPRING 90% | FALL 10% | FALL 50% | FALL 90% |
|---|---|---|---|---|---|---|
| 36°F | Feb 20 | Jan 17 | Dec 20 | Dec 6 | Dec 26 | Jan 30 |
| 32°F | Jan 28 | Jan 4 | Dec 19 | Dec 18 | Jan 2 | Jan 26 |
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 West Whittier-Los Nietos, drawn to the day from the local frost dates. The dashed line is today.
Nearby weather stations
3 within 28 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.
West Whittier-Los Nietos planting FAQ
When is the last spring frost in West Whittier-Los Nietos, CA?
On average, the last spring frost in West Whittier-Los Nietos is around January 4 (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 West Whittier-Los Nietos, CA?
The first fall frost in West Whittier-Los Nietos typically arrives around January 2 (50% probability at 32°F). Harvest or protect frost-sensitive crops before then.
What hardiness zone is West Whittier-Los Nietos in?
West Whittier-Los Nietos is in USDA hardiness zone 10b. In zone 10b, winters are mild — many tender perennials overwinter here.
How long is the growing season in West Whittier-Los Nietos?
West Whittier-Los Nietos has about -2 frost-free days — a short growing season — between the average last spring frost (January 4) and first fall frost (January 2).
When should I plant tomatoes in West Whittier-Los Nietos?
For West Whittier-Los Nietos, sow tomatoes indoors about November 9–November 23 and move the seedlings out around January 11, after the last spring frost.
Never miss a window in West Whittier-Los Nietos
An email when it’s time to start seeds, transplant, and sow — timed to West Whittier-Los Nietos’s frost dates. Double opt-in, one-click unsubscribe, no spam.
Nearby cities
8 within reach- Pico Rivera · 2 km
- Whittier · 5 km
- Santa Fe Springs · 5 km
- Montebello · 6 km
- South Whittier · 6 km
- Downey · 7 km
- Norwalk · 8 km
- Commerce · 8 km
Frost dates recorded at SAN GABRIEL FIRE DEPT, 12 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 West Whittier-Los Nietos, CA — Frost Dates & Zone 10b." Frost normals: NOAA NCEI U.S. Climate Normals 1991–2020, station USC00047785. Retrieved from https://blissgarden.com/california/west-whittier-los-nietos.