Willits, CA 95454 Frost Dates
95454, near Willits, CA: the frost window
Typically, the last spring freeze lands around 04/23, roughly 238 days out. Fall's first freeze usually shows up around 10/19, roughly 179 days after the last spring frost.
The USDA Plant Hardiness Zone Map puts Willits in Zone 9a (20 to 25°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
Willits's growing season runs out in roughly 7 weeks — a cold frame or greenhouse kit is the usual way to keep cool-weather crops going past the first frost.
Why 04/23 isn't a guarantee
04/23 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 04/04 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 05/11 and only about 1 year in 10 sees frost after that.
Willits against the rest of the dataset
At roughly 179 frost-free days, Willits places 25,289 of 40,283 ZIP codes in this dataset. Within CA, it ranks 2,341 of 2,555.
Learn more
Two guides worth reading on 95454: local microclimates, on what one yard in Willits can differ from the 95454 normal, and zone vs. frost date, on why Zone 9a and Willits's frost date answer different questions.