Lancaster, CA 93532 Frost Dates
93532, near Lancaster, CA: the frost window
Typically, the last spring freeze lands around 04/06, roughly 221 days out. Fall's first freeze usually shows up around 11/29, roughly 236 days after the last spring frost.
The USDA Plant Hardiness Zone Map puts Lancaster 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
Lancaster's growing season runs out in roughly 13 weeks — a cold frame or greenhouse kit is the usual way to keep cool-weather crops going past the first frost.
How much risk comes with planting early here
04/06 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 02/20 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 05/20 and only about 1 year in 10 sees frost after that.
Lancaster against the rest of the dataset
At roughly 236 frost-free days, Lancaster places 9,224 of 40,283 ZIP codes in this dataset. Within CA, it ranks 2,143 of 2,555.
Learn more
Two guides worth reading on 93532: local microclimates, on what one yard in Lancaster can differ from the 93532 normal, and zone vs. frost date, on why Zone 9a and Lancaster's frost date answer different questions.