Lancaster, CA 93534 Frost Dates
Lancaster, CA: when does the frost end?
Typically, the last spring freeze lands around 04/03, roughly 218 days out. Fall's first freeze usually shows up around 11/01, roughly 211 days after the last spring frost.
Lancaster sits in USDA Zone 8a (10 to 15°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
With roughly 9 weeks until Lancaster's first fall frost, a row cover or cold frame is what stretches the last few weeks of harvest here.
Why 04/03 isn't a guarantee
04/03 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 03/08 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 04/23 and only about 1 year in 10 sees frost after that.
Lancaster against the rest of the dataset
Lancaster's growing season runs about 211 days, ranking 14,706 of 40,283 US ZIP codes measured here, longest to shortest. Within CA, it ranks 2,209 of 2,555.
Learn more
Before leaning on 93534's figures: zone vs. frost date explains why Zone 8a and Lancaster's frost date answer different questions, while the frost range explains how to read the range around Lancaster's dates instead of trusting one.