When to plant in Perris, CA
USDA Zone 9bPerris, California frost dates, USDA zone, and a full-year planting calendar, drawn from the nearest NOAA station and tuned to the local season.
Perris enjoys a long ~324-day frost-free season — you can succession-sow, fit in a second crop, and grow long-season heat-lovers with room to spare. Heads up: the nearest complete-normals station is about 16 km from Perris, so your yard's frost dates can differ — a low spot or a paved city center can shift them by a week. In zone 9b, frost is a minor factor for Perris — most perennials thrive, and annual vegetables can go out early and stay late.
Frost probability
ELSINORE · 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 Perris’s own odds, recorded at ELSINORE.
| Threshold | SPRING 10% | SPRING 50% | SPRING 90% | FALL 10% | FALL 50% | FALL 90% |
|---|---|---|---|---|---|---|
| 36°F | Apr 2 | Feb 28 | Jan 29 | Nov 15 | Dec 2 | Dec 18 |
| 32°F | Feb 27 | Jan 28 | Dec 24 | Dec 1 | Dec 18 | Jan 24 |
| 28°F | Feb 9 | Jan 1 | Dec 12 | Dec 9 | Dec 27 | Feb 3 |
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 Perris, drawn to the day from the local frost dates. The dashed line is today.
Nearby weather stations
3 within 24 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.
Perris planting FAQ
When is the last spring frost in Perris, CA?
Perris's average last spring frost falls near January 28 — the 50% mark at 32°F in the 1991–2020 normals. Hold tender transplants until the risk has passed, then plant out.
When is the first fall frost in Perris, CA?
The first fall frost in Perris typically arrives around December 18 (50% probability at 32°F). Harvest or protect frost-sensitive crops before then.
What hardiness zone is Perris in?
Perris is in USDA hardiness zone 9b. In zone 9b, winters are mild — many tender perennials overwinter here.
How long is the growing season in Perris?
Perris has about 324 frost-free days — a long growing season — between the average last spring frost (January 28) and first fall frost (December 18).
When should I plant tomatoes in Perris?
For Perris, sow tomatoes indoors about December 3–December 17 and move the seedlings out around February 4, after the last spring frost.
Never miss a window in Perris
An email when it’s time to start seeds, transplant, and sow — timed to Perris’s frost dates. Double opt-in, one-click unsubscribe, no spam.
Nearby cities
8 within reach- Mead Valley · 8 km
- Menifee · 12 km
- Canyon Lake · 12 km
- Moreno Valley · 15 km
- Lake Elsinore · 16 km
- Woodcrest · 17 km
- Wildomar · 19 km
- Lakeland Village · 21 km
Frost dates recorded at ELSINORE, 16 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 Perris, CA — Frost Dates & Zone 9b." Frost normals: NOAA NCEI U.S. Climate Normals 1991–2020, station USC00042805. Retrieved from https://blissgarden.com/california/perris.