Ukiah, CA 95470 Frost Dates
Ukiah, CA: when does the frost end?
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.
The USDA Plant Hardiness Zone Map puts Ukiah 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
With roughly 10 weeks until Ukiah's first fall frost, a row cover or cold frame is what stretches the last few weeks of harvest here.
How much risk comes with planting early here
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.
Ukiah against the rest of the dataset
At roughly 211 frost-free days, Ukiah places 14,735 of 40,283 ZIP codes in this dataset. Within CA, it ranks 2,211 of 2,555.
Learn more
Before leaning on 95470's figures: local microclimates explains what one yard in Ukiah can differ from the 95470 normal, while zone vs. frost date explains why Zone 9a and Ukiah's frost date answer different questions.