Wasco, CA 93280 Frost Dates
93280, near Wasco, CA: the frost window
Typically, the last spring freeze lands around 01/31, roughly 156 days out. Fall's first freeze usually shows up around 12/05, roughly 315 days after the last spring frost.
The USDA Plant Hardiness Zone Map puts Wasco in Zone 9a (20 to 25°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
Wasco'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 Wasco's last frost
01/31 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 01/02 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 02/27 and only about 1 year in 10 sees frost after that.
Wasco against the rest of the dataset
Wasco's growing season runs about 315 days, ranking 3,417 of 40,283 US ZIP codes measured here, longest to shortest. Within CA, it ranks 1,426 of 2,555.
Learn more
Two guides worth reading on 93280: the frost range, on how to read the range around Wasco's dates instead of trusting one, and local microclimates, on what one yard in Wasco can differ from the 93280 normal.