Winters, CA 95798 Frost Dates
Frost dates for Winters, CA, ZIP 95798
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.
Winters 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.
What to do before the first frost
Zone 9b around Winters has about 13 weeks left before the first fall frost — that's the usual window to get a cold frame up if you want to keep harvesting past it.
How much risk comes with planting early here
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
Winters's growing season runs about 284 days, ranking 4,687 of 40,283 US ZIP codes measured here, longest to shortest. Within CA, it ranks 1,738 of 2,555.
Learn more
local microclimates explains what one yard in Winters can differ from the 95798 normal, and zone vs. frost date explains why Zone 9b and Winters's frost date answer different questions.