Twentynine Palms, CA 92406 Frost Dates
Frost dates for Twentynine Palms, CA, ZIP 92406
Around 03/06 is the usual last spring frost, about 190 days away. The first fall frost typically arrives around 12/08, about 272 frost-free days later.
The USDA Plant Hardiness Zone Map puts Twentynine Palms in Zone 10a (30 to 35°F average annual minimum); frost dates are NOAA's 1991-2020 station normal, not this year's forecast.
What to do before the first frost
Zone 10a around Twentynine Palms has about 15 weeks left before the first fall frost — that's the usual window to get a cold frame up if you want to keep harvesting past it.
Why 03/06 isn't a guarantee
03/06 is the middle of 30 years of NOAA records, not a promise. Plant by 01/17 and you're betting against frost in roughly 9 years out of 10. 04/09 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Twentynine Palms compares
About 272 days separate Twentynine Palms's last and first frost, putting it 5,350 of 40,283 ZIP codes nationally. Within CA, it ranks 1,855 of 2,555.
Learn more
the frost range explains how to read the range around Twentynine Palms's dates instead of trusting one, and local microclimates explains what one yard in Twentynine Palms can differ from the 92406 normal.