Hemet, CA 92545 Frost Dates
When can you plant in Hemet, CA?
Around 01/31 is the usual last spring frost, about 156 days away. The first fall frost typically arrives around 12/10, about 315 frost-free days later.
Hemet sits in USDA Zone 9b (25 to 30°F average annual minimum). The dates above are NOAA's 1991-2020 normal at the nearest reporting station, a 30-year average, not a forecast.
What to do before the first frost
About 15 weeks of growing season left in Hemet before the first fall frost — a cold frame or row cover can stretch harvest weeks past that date.
How much risk comes with planting early here
01/31 is the middle of 30 years of NOAA records, not a promise. Plant by 02/28 and you're betting against frost in roughly 9 years out of 10. 12/31 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Hemet compares
About 315 days separate Hemet's last and first frost, putting it 3,405 of 40,283 ZIP codes nationally. Within CA, it ranks 1,420 of 2,555.
Learn more
local microclimates covers what one yard in Hemet can differ from the 92545 normal. zone vs. frost date covers why Zone 9b and Hemet's frost date answer different questions.