Bradbury, CA 91008 Frost Dates
Bradbury, CA: when does the frost end?
The last spring frost here typically falls around 01/04, about 129 days from today. Fall's first freeze usually shows up around 01/02, roughly 365 days after the last spring frost.
Zone 10a (30 to 35°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 Bradbury, not a forecast for this year.
Stretching the season past the first frost
With roughly 18 weeks until Bradbury's first fall frost, a row cover or cold frame is what stretches the last few weeks of harvest here.
Why 01/04 isn't a guarantee
01/04 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 01/28 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 12/19 and only about 1 year in 10 sees frost after that.
Bradbury against the rest of the dataset
About 365 days separate Bradbury's last and first frost, putting it 1,975 of 40,283 ZIP codes nationally. Within CA, it ranks 898 of 2,555.
Learn more
Before leaning on 91008's figures: zone vs. frost date explains why Zone 10a and Bradbury's frost date answer different questions, while the frost range explains how to read the range around Bradbury's dates instead of trusting one.