Apple Valley, CA 92307 Frost Dates
Apple Valley, CA: when does the frost end?
Around 03/18 is the usual last spring frost, about 202 days away. Fall's first freeze usually shows up around 11/11, roughly 233 days after the last spring frost.
The USDA Plant Hardiness Zone Map puts Apple Valley in Zone 8b (15 to 20°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 11 weeks until Apple Valley's first fall frost, a row cover or cold frame is what stretches the last few weeks of harvest here.
Why 03/18 isn't a guarantee
03/18 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 02/23 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 04/12 and only about 1 year in 10 sees frost after that.
Apple Valley against the rest of the dataset
At roughly 233 frost-free days, Apple Valley places 9,854 of 40,283 ZIP codes in this dataset. Within CA, it ranks 2,154 of 2,555.
Learn more
Before leaning on 92307's figures: zone vs. frost date explains why Zone 8b and Apple Valley's frost date answer different questions, while the frost range explains how to read the range around Apple Valley's dates instead of trusting one.