Danville, CA 94528 Frost Dates
Danville, CA: when does the frost end?
The last spring frost here typically falls around 03/08, about 192 days from today. Fall's first freeze usually shows up around 12/22, roughly 282 days after the last spring frost.
Zone 9b (25 to 30°F average annual minimum) comes from the USDA Plant Hardiness Zone Map; the frost dates above are the 1991-2020 normal at the nearest reporting NOAA station for Danville, not a forecast for this year.
Stretching the season past the first frost
With roughly 17 weeks until Danville's first fall frost, a row cover or cold frame is what stretches the last few weeks of harvest here.
Why 03/08 isn't a guarantee
03/08 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 01/12 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.
Danville against the rest of the dataset
Danville's growing season runs about 282 days, ranking 4,764 of 40,283 US ZIP codes measured here, longest to shortest. Within CA, it ranks 1,762 of 2,555.
Learn more
Before leaning on 94528's figures: zone vs. frost date explains why Zone 9b and Danville's frost date answer different questions, while the frost range explains how to read the range around Danville's dates instead of trusting one.