Twentynine Palms, CA 92393 Frost Dates
92393, near Twentynine Palms, CA: the frost window
Typically, the last spring freeze lands around 03/06, roughly 190 days out. Fall's first freeze usually shows up around 12/08, roughly 272 days after the last spring frost.
Twentynine Palms sits in USDA Zone 8b (15 to 20°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
Twentynine Palms's growing season runs out in roughly 15 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 Twentynine Palms's last frost
03/06 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 01/17 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 04/09 and only about 1 year in 10 sees frost after that.
Twentynine Palms against the rest of the dataset
About 272 days separate Twentynine Palms's last and first frost, putting it 5,348 of 40,283 ZIP codes nationally. Within CA, it ranks 1,853 of 2,555.
Learn more
Two guides worth reading on 92393: zone vs. frost date, on why Zone 8b and Twentynine Palms's frost date answer different questions, and the frost range, on how to read the range around Twentynine Palms's dates instead of trusting one.