When to plant in Moreno Valley, CA
USDA Zone 9bEverything below — frost dates, hardiness zone, and what to plant when in Moreno Valley, California — is derived from the closest NOAA station with complete climate normals.
Moreno Valley enjoys a long ~326-day frost-free season — you can succession-sow, fit in a second crop, and grow long-season heat-lovers with room to spare. In zone 9b, frost is a minor factor for Moreno Valley — most perennials thrive, and annual vegetables can go out early and stay late.
Frost probability
REDLANDS · 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 Moreno Valley’s own odds, recorded at REDLANDS.
| Threshold | SPRING 10% | SPRING 50% | SPRING 90% | FALL 10% | FALL 50% | FALL 90% |
|---|---|---|---|---|---|---|
| 36°F | Apr 5 | Mar 2 | Jan 31 | Nov 17 | Dec 2 | Dec 19 |
| 32°F | Feb 28 | Jan 27 | Dec 21 | Dec 1 | Dec 19 | Jan 26 |
| 28°F | Feb 15 | Jan 7 | Dec 17 | Dec 13 | Jan 1 | Feb 13 |
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 Moreno Valley, drawn to the day from the local frost dates. The dashed line is today.
Nearby weather stations
3 within 17 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.
Moreno Valley planting FAQ
When is the last spring frost in Moreno Valley, CA?
Moreno Valley's average last spring frost falls near January 27 — 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 Moreno Valley, CA?
Expect Moreno Valley's first fall frost near December 19 — a 50% chance of 32°F by that date. Bring in or cover tender crops ahead of it.
What hardiness zone is Moreno Valley in?
Moreno Valley is in USDA hardiness zone 9b. In zone 9b, winters are mild — many tender perennials overwinter here.
How long is the growing season in Moreno Valley?
Moreno Valley has about 326 frost-free days — a long growing season — between the average last spring frost (January 27) and first fall frost (December 19).
When should I plant tomatoes in Moreno Valley?
For Moreno Valley, sow tomatoes indoors about December 2–December 16 and move the seedlings out around February 3, after the last spring frost.
Never miss a window in Moreno Valley
An email when it’s time to start seeds, transplant, and sow — timed to Moreno Valley’s frost dates. Double opt-in, one-click unsubscribe, no spam.
Nearby cities
8 within reach- Mead Valley · 12 km
- Loma Linda · 14 km
- Redlands · 15 km
- Perris · 15 km
- Grand Terrace · 16 km
- Calimesa · 16 km
- Woodcrest · 16 km
- Riverside · 17 km
Frost dates recorded at REDLANDS, 13 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 Moreno Valley, CA — Frost Dates & Zone 9b." Frost normals: NOAA NCEI U.S. Climate Normals 1991–2020, station USC00047306. Retrieved from https://blissgarden.com/california/moreno-valley.