Menifee, CA 92586 Frost Dates
92586, near Menifee, CA: the frost window
Around 01/28 is the usual last spring frost, about 153 days away. Fall's first freeze usually shows up around 12/18, roughly 329 days after the last spring frost.
Menifee 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.
Stretching the season past the first frost
Menifee's growing season runs out in roughly 16 weeks — a cold frame or greenhouse kit is the usual way to keep cool-weather crops going past the first frost.
Why 01/28 isn't a guarantee
01/28 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 02/27 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 12/24 and only about 1 year in 10 sees frost after that.
Menifee against the rest of the dataset
At roughly 329 frost-free days, Menifee places 3,077 of 40,283 ZIP codes in this dataset. Within CA, it ranks 1,330 of 2,555.
Learn more
Two guides worth reading on 92586: local microclimates, on what one yard in Menifee can differ from the 92586 normal, and zone vs. frost date, on why Zone 9b and Menifee's frost date answer different questions.