Ukiah, CA 95415 Frost Dates
When can you plant in Ukiah, CA?
Typically, the last spring freeze lands around 03/05, roughly 189 days out. The first fall frost typically arrives around 11/21, about 259 frost-free days later.
The USDA Plant Hardiness Zone Map puts Ukiah in Zone 9b (25 to 30°F average annual minimum); frost dates are NOAA's 1991-2020 station normal, not this year's forecast.
What to do before the first frost
About 12 weeks of growing season left in Ukiah before the first fall frost — a cold frame or row cover can stretch harvest weeks past that date.
The actual range around Ukiah's last frost
03/05 is the middle of 30 years of NOAA records, not a promise. Plant by 01/29 and you're betting against frost in roughly 9 years out of 10. 04/07 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Ukiah compares
At roughly 259 frost-free days, Ukiah places 6,567 of 40,283 ZIP codes in this dataset. Within CA, it ranks 2,048 of 2,555.
Learn more
the frost range covers how to read the range around Ukiah's dates instead of trusting one. local microclimates covers what one yard in Ukiah can differ from the 95415 normal.