Frost Dates for Hemet, CA 92543

Hemet has 3 ZIP codes. The Hemet, CA frost page lists all of them with their dates.

Last spring frost May 10 · First fall frost November 9 · 183 frost-free days · USDA Zone 9b

Frost probability for 92543

Frost10%50%90%
Spring (last frost)June 6May 10April 14
Fall (first frost)October 18November 9December 1

Dates come from NOAA 1971–2000 freeze probabilities at the nearest reporting station (37.9 km away); the 50% date is the median year.

Month by month in Hemet

MonthWhat to do
JanuaryPlan your garden layout and order seeds. Research varieties suited to your frost dates.
FebruaryStart the slowest-growing crops indoors: onions, leeks, and celery (10–12 weeks before last frost).
MarchStart peppers and eggplant indoors 8–10 weeks before your last frost (around May 10). Start tomatoes about two weeks later, 6–8 weeks before last frost.
AprilStart herbs, basil, and squash indoors (4–6 weeks before frost). Direct sow peas, spinach, and lettuce if soil is workable.
MayLast frost around May 10. Transplant cold-hardy crops (broccoli, kale, cabbage). Harden off tomato and pepper seedlings.
JuneFrost has passed. Transplant tomatoes, peppers, and basil outdoors. Direct sow beans, cucumbers, squash, and zucchini.
JulySuccession plant lettuce and greens. Keep beds weeded and watered consistently.
AugustHarvest regularly to encourage production. Monitor for pests and disease.
SeptemberMidsummer: harvest beans, zucchini, cucumbers. Start brassica seeds indoors for fall.
OctoberFirst fall frost approaching (around November 9). Transplant fall brassicas. Sow spinach, arugula, and radishes.
NovemberFirst frost around November 9. Harvest tomatoes and peppers before frost. Cover cold-hardy crops with row covers to extend the season.
DecemberHarvest remaining cold-hardy crops: kale, carrots, and beets. Plant garlic bulbs for next year.

What grows in a 183-day season

Frequently Asked Questions

What is the last frost date for Hemet, CA (ZIP 92543)?

The median last spring frost date for Hemet, CA (ZIP code 92543) is around May 10. This is the 50th-percentile date — meaning half of all years see frost end before this date. Use the 10% and 90% dates to understand the full range of risk in your area.

What is the first fall frost date in Hemet, CA?

The median first fall frost date for Hemet, CA is around November 9. Plan to harvest or protect frost-sensitive crops like tomatoes and peppers at least a week before this date to avoid losses.

How long is the growing season in Hemet, CA?

The frost-free growing season in Hemet is about 183 days. This window — from your last spring frost to your first fall frost — is when warm-season vegetables thrive. Cold-hardy crops like kale, spinach, and peas can extend your season by weeks on either side.

What USDA hardiness zone is Hemet, CA?

Based on frost date patterns, Hemet falls approximately in 9b. USDA hardiness zones are determined by average annual minimum winter temperatures and guide both plant selection and planting timing for your location.

When should I start tomatoes indoors in Hemet, CA?

Start tomato seeds indoors 6–8 weeks before your last frost date (around May 10). For Hemet, that's roughly March 15 to March 29. Transplant outdoors 1–2 weeks after your last frost.

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