Twentynine Palms, CA 93558 Frost Dates
Twentynine Palms, CA: when does the frost end?
Around 03/06 is the usual last spring frost, about 190 days away. Fall's first freeze usually shows up around 12/08, roughly 272 days after the last spring frost.
Twentynine Palms 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.
Stretching the season past the first frost
With roughly 15 weeks until Twentynine Palms's first fall frost, a row cover or cold frame is what stretches the last few weeks of harvest here.
How much risk comes with planting early here
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 5,354 of 40,283 ZIP codes nationally. Within CA, it ranks 1,859 of 2,555.
Learn more
Before leaning on 93558's figures: local microclimates explains what one yard in Twentynine Palms can differ from the 93558 normal, while zone vs. frost date explains why Zone 9a and Twentynine Palms's frost date answer different questions.