Winters, CA 95617 Frost Dates
When can you plant in Winters, CA?
Around 02/18 is the usual last spring frost, about 174 days away. The first fall frost typically arrives around 11/30, about 284 frost-free days later.
The USDA Plant Hardiness Zone Map puts Winters 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 13 weeks of growing season left in Winters before the first fall frost — a cold frame or row cover can stretch harvest weeks past that date.
The actual range around Winters's last frost
02/18 is the middle of 30 years of NOAA records, not a promise. Plant by 01/17 and you're betting against frost in roughly 9 years out of 10. 03/14 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Winters compares
About 284 days separate Winters's last and first frost, putting it 4,685 of 40,283 ZIP codes nationally. Within CA, it ranks 1,736 of 2,555.
Learn more
local microclimates covers what one yard in Winters can differ from the 95617 normal. zone vs. frost date covers why Zone 9b and Winters's frost date answer different questions.