Barstow, CA 92347 Frost Dates
92347, near Barstow, CA: the frost window
The last spring frost here typically falls around 02/22, about 178 days from today. Fall's first freeze usually shows up around 11/23, roughly 271 days after the last spring frost.
Barstow sits in USDA Zone 9a (20 to 25°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
Barstow's growing season runs out in roughly 12 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 Barstow's last frost
02/22 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 01/29 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 03/24 and only about 1 year in 10 sees frost after that.
Barstow against the rest of the dataset
At roughly 271 frost-free days, Barstow places 5,420 of 40,283 ZIP codes in this dataset. Within CA, it ranks 1,876 of 2,555.
Learn more
Two guides worth reading on 92347: the frost range, on how to read the range around Barstow's dates instead of trusting one, and local microclimates, on what one yard in Barstow can differ from the 92347 normal.