Hemet, CA 92544 Frost Dates
92544, near Hemet, CA: the frost window
The last spring frost here typically falls around 01/10, about 135 days from today. Fall's first freeze usually shows up around 12/23, roughly 350 days after the last spring frost.
The USDA Plant Hardiness Zone Map puts Hemet in Zone 9b (25 to 30°F average annual minimum); frost dates are NOAA's 1991-2020 station normal, not this year's forecast.
Stretching the season past the first frost
Hemet's growing season runs out in roughly 17 weeks — a cold frame or greenhouse kit is the usual way to keep cool-weather crops going past the first frost.
Why 01/10 isn't a guarantee
01/10 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 02/25 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 12/14 and only about 1 year in 10 sees frost after that.
Hemet against the rest of the dataset
About 350 days separate Hemet's last and first frost, putting it 2,321 of 40,283 ZIP codes nationally. Within CA, it ranks 1,027 of 2,555.
Learn more
Two guides worth reading on 92544: local microclimates, on what one yard in Hemet can differ from the 92544 normal, and zone vs. frost date, on why Zone 9b and Hemet's frost date answer different questions.