Winters, CA 95799 Frost Dates
Winters, CA: when does the frost end?
The last spring frost here typically falls around 02/18, about 174 days from today. Fall's first freeze usually shows up around 11/30, roughly 284 days after the last spring frost.
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.
Stretching the season past the first frost
With roughly 13 weeks until Winters's first fall frost, a row cover or cold frame is what stretches the last few weeks of harvest here.
Why 02/18 isn't a guarantee
02/18 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 01/17 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 03/14 and only about 1 year in 10 sees frost after that.
Winters against the rest of the dataset
About 284 days separate Winters's last and first frost, putting it 4,688 of 40,283 ZIP codes nationally. Within CA, it ranks 1,739 of 2,555.
Learn more
Before leaning on 95799's figures: local microclimates explains what one yard in Winters can differ from the 95799 normal, while zone vs. frost date explains why Zone 9b and Winters's frost date answer different questions.