Tehachapi, CA 93531 Frost Dates
When can you plant in Tehachapi, CA?
Around 03/15 is the usual last spring frost, about 199 days away. The first fall frost typically arrives around 11/17, about 241 frost-free days later.
Tehachapi 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.
What to do before the first frost
About 12 weeks of growing season left in Tehachapi before the first fall frost — a cold frame or row cover can stretch harvest weeks past that date.
Why 03/15 isn't a guarantee
03/15 is the middle of 30 years of NOAA records, not a promise. Plant by 02/21 and you're betting against frost in roughly 9 years out of 10. 04/17 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Tehachapi compares
About 241 days separate Tehachapi's last and first frost, putting it 8,531 of 40,283 ZIP codes nationally. Within CA, it ranks 2,118 of 2,555.
Learn more
local microclimates covers what one yard in Tehachapi can differ from the 93531 normal. zone vs. frost date covers why Zone 9a and Tehachapi's frost date answer different questions.