Willits, CA 95427 Frost Dates
Willits, CA: when does the frost end?
Around 03/19 is the usual last spring frost, about 203 days away. Fall's first freeze usually shows up around 11/20, roughly 245 days after the last spring frost.
Willits 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
With roughly 12 weeks until Willits's first fall frost, a row cover or cold frame is what stretches the last few weeks of harvest here.
The actual range around Willits's last frost
03/19 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 02/13 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 04/15 and only about 1 year in 10 sees frost after that.
Willits against the rest of the dataset
Willits's growing season runs about 245 days, ranking 8,018 of 40,283 US ZIP codes measured here, longest to shortest. Within CA, it ranks 2,107 of 2,555.
Learn more
Before leaning on 95427's figures: zone vs. frost date explains why Zone 9b and Willits's frost date answer different questions, while the frost range explains how to read the range around Willits's dates instead of trusting one.