Willits, CA 95490 Frost Dates
95490, near Willits, CA: the frost window
Typically, the last spring freeze lands around 04/08, roughly 223 days out. Fall's first freeze usually shows up around 11/06, roughly 211 days after the last spring frost.
Willits sits in USDA Zone 9a (20 to 25°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
Willits's growing season runs out in roughly 10 weeks — a cold frame or greenhouse kit is the usual way to keep cool-weather crops going past the first frost.
The actual range around Willits's last frost
04/08 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 03/11 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 04/29 and only about 1 year in 10 sees frost after that.
Willits against the rest of the dataset
At roughly 211 frost-free days, Willits places 14,753 of 40,283 ZIP codes in this dataset. Within CA, it ranks 2,213 of 2,555.
Learn more
Two guides worth reading on 95490: local microclimates, on what one yard in Willits can differ from the 95490 normal, and zone vs. frost date, on why Zone 9a and Willits's frost date answer different questions.