Hesperia, CA 92344 Frost Dates
92344, near Hesperia, CA: the frost window
Around 02/28 is the usual last spring frost, about 184 days away. Fall's first freeze usually shows up around 12/01, roughly 270 days after the last spring frost.
The USDA Plant Hardiness Zone Map puts Hesperia 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
Hesperia's growing season runs out in roughly 14 weeks — a cold frame or greenhouse kit is the usual way to keep cool-weather crops going past the first frost.
The actual range around Hesperia's last frost
02/28 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 02/01 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 04/03 and only about 1 year in 10 sees frost after that.
Hesperia against the rest of the dataset
Hesperia's growing season runs about 270 days, ranking 5,476 of 40,283 US ZIP codes measured here, longest to shortest. Within CA, it ranks 1,898 of 2,555.
Learn more
Two guides worth reading on 92344: zone vs. frost date, on why Zone 8b and Hesperia's frost date answer different questions, and the frost range, on how to read the range around Hesperia's dates instead of trusting one.