Willits, CA 95429 Frost Dates
95429, near Willits, CA: the frost window
Around 04/23 is the usual last spring frost, about 238 days away. 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
About 179 days separate Willits's last and first frost, putting it 25,288 of 40,283 ZIP codes nationally. Within CA, it ranks 2,340 of 2,555.
Learn more
Two guides worth reading on 95429: local microclimates, on what one yard in Willits can differ from the 95429 normal, and zone vs. frost date, on why Zone 9a and Willits's frost date answer different questions.