When to plant in Hesperia, CA
USDA Zone 8bEverything below — frost dates, hardiness zone, and what to plant when in Hesperia, California — is derived from the closest NOAA station with complete climate normals.
With about 276 frost-free days, Hesperia supports back-to-back plantings; stagger sowings every few weeks to keep beds productive spring through fall. Zone 8b means many perennials and even some tender shrubs overwinter in Hesperia, while your frost dates still decide when annuals go out.
Frost probability
HESPERIA 2E · 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 Hesperia’s own odds, recorded at HESPERIA 2E.
| Threshold | SPRING 10% | SPRING 50% | SPRING 90% | FALL 10% | FALL 50% | FALL 90% |
|---|---|---|---|---|---|---|
| 36°F | Apr 22 | Mar 31 | Mar 3 | Oct 29 | Nov 16 | Dec 1 |
| 32°F | Apr 3 | Feb 28 | Feb 1 | Nov 11 | Dec 1 | Dec 16 |
| 28°F | Mar 1 | Jan 30 | Dec 31 | Nov 26 | Dec 14 | Jan 10 |
Download this table as CSV ↓ — every threshold and probability, plus this city’s planting-window dates.
What to plant now
TODAY · JULY 19Full-year planting calendar
Each bar is the exact window to take a planting action in Hesperia, drawn to the day from the local frost dates. The dashed line is today.
Nearby weather stations
3 within 20 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.
Hesperia planting FAQ
When is the last spring frost in Hesperia, CA?
Hesperia's average last spring frost falls near February 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 Hesperia, CA?
The first fall frost in Hesperia typically arrives around December 1 (50% probability at 32°F). Harvest or protect frost-sensitive crops before then.
What hardiness zone is Hesperia in?
Hesperia is in USDA hardiness zone 8b. In zone 8b, winters are mild — many tender perennials overwinter here.
How long is the growing season in Hesperia?
There are roughly 276 frost-free days in Hesperia (a long growing season), running from the average last frost around February 28 to the first fall frost near December 1.
When should I plant tomatoes in Hesperia?
In Hesperia, start tomato seeds indoors around January 3–January 17, then transplant seedlings outdoors around March 7 once the danger of frost has passed.
Never miss a window in Hesperia
An email when it’s time to start seeds, transplant, and sow — timed to Hesperia’s frost dates. Double opt-in, one-click unsubscribe, no spam.
Nearby cities
8 within reach- Victorville · 15 km
- Apple Valley · 18 km
- Phelan · 20 km
- Lake Arrowhead · 20 km
- Adelanto · 23 km
- Muscoy · 27 km
- San Bernardino · 29 km
- Rialto · 32 km
Frost dates recorded at HESPERIA 2E, 5 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 Hesperia, CA — Frost Dates & Zone 8b." Frost normals: NOAA NCEI U.S. Climate Normals 1991–2020, station USC00043937. Retrieved from https://blissgarden.com/california/hesperia.