When to plant in Temescal Valley, CA
USDA Zone 10aHere are the average frost dates, USDA hardiness zone, and a month-by-month planting calendar for Temescal Valley, California — all computed from Temescal Valley's nearest NOAA weather station.
Temescal Valley 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. Zone 10a is warm enough that Temescal Valley can grow subtropical perennials, and the short (or absent) frost period barely limits the annual calendar.
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 Temescal Valley’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 Temescal Valley, drawn to the day from the local frost dates. The dashed line is today.
Nearby weather stations
3 within 23 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.
Temescal Valley planting FAQ
When is the last spring frost in Temescal Valley, CA?
Temescal Valley'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 Temescal Valley, CA?
The first fall frost in Temescal Valley typically arrives around December 18 (50% probability at 32°F). Harvest or protect frost-sensitive crops before then.
What hardiness zone is Temescal Valley in?
Temescal Valley is in USDA hardiness zone 10a. In zone 10a, winters are mild — many tender perennials overwinter here.
How long is the growing season in Temescal Valley?
There are roughly 324 frost-free days in Temescal Valley (a long growing season), running from the average last frost around January 28 to the first fall frost near December 18.
When should I plant tomatoes in Temescal Valley?
In Temescal Valley, start tomato seeds indoors around December 3–December 17, then transplant seedlings outdoors around February 4 once the danger of frost has passed.
Never miss a window in Temescal Valley
An email when it’s time to start seeds, transplant, and sow — timed to Temescal Valley’s frost dates. Double opt-in, one-click unsubscribe, no spam.
Nearby cities
8 within reach- Home Gardens · 14 km
- Lake Elsinore · 15 km
- Corona · 15 km
- Lakeland Village · 15 km
- Woodcrest · 16 km
- Rancho Santa Margarita · 19 km
- Mead Valley · 19 km
- Norco · 20 km
Frost dates recorded at ELSINORE, 14 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 Temescal Valley, CA — Frost Dates & Zone 10a." Frost normals: NOAA NCEI U.S. Climate Normals 1991–2020, station USC00042805. Retrieved from https://blissgarden.com/california/temescal-valley.