Vacaville, CA 95688 Frost Dates
Vacaville, 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 11/28, roughly 283 days after the last spring frost.
Vacaville 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 13 weeks until Vacaville's first fall frost, a row cover or cold frame is what stretches the last few weeks of harvest here.
The actual range around Vacaville's last frost
02/18 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 01/11 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 03/25 and only about 1 year in 10 sees frost after that.
Vacaville against the rest of the dataset
Vacaville's growing season runs about 283 days, ranking 4,732 of 40,283 US ZIP codes measured here, longest to shortest. Within CA, it ranks 1,742 of 2,555.
Learn more
Before leaning on 95688's figures: local microclimates explains what one yard in Vacaville can differ from the 95688 normal, while zone vs. frost date explains why Zone 9b and Vacaville's frost date answer different questions.