Ukiah, CA 95463 Frost Dates
Ukiah, CA: when does the frost end?
Typically, the last spring freeze lands around 03/19, roughly 203 days out. Fall's first freeze usually shows up around 11/20, roughly 245 days after the last spring frost.
Ukiah 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 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
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.
Ukiah against the rest of the dataset
Ukiah's growing season runs about 245 days, ranking 7,997 of 40,283 US ZIP codes measured here, longest to shortest. Within CA, it ranks 2,102 of 2,555.
Learn more
Before leaning on 95463's figures: the frost range explains how to read the range around Ukiah's dates instead of trusting one, while local microclimates explains what one yard in Ukiah can differ from the 95463 normal.