When is the last frost in Twentynine Palms, CA?

For ZIP code 92277, the average last spring frost (32°F) is January 24, based on NOAA 1991-2020 climate normals for the Twentynine Palms, CA weather station. There is a 1-in-10 chance of a frost after February 22.

When is the first frost in Twentynine Palms, CA?

The average first fall frost (32°F) is December 10. There is a 1-in-10 chance of frost by November 24, so tender plants are at risk from that point on.

How long is the growing season in 92277?

In half of years, the frost-free season (between the last and first 32°F frost) is at least 321 days long.

Are these frost dates a forecast?

No. They are 30-year averages and probabilities from NOAA weather station records. Use them to plan, then watch your local forecast before planting tender crops or leaving them uncovered.

Frost dates for 92277Twentynine Palms, CA

The average last spring frost in Twentynine Palms is January 24 and the average first fall frost is December 10, giving a typical growing season of about 321 days. Dates are based on NOAA 1991-2020 climate normals.

Average last spring frost: Jan 24
Average first fall frost: Dec 10
Growing season: 321 days

Frost risk by date

NOAA reports frost dates as probabilities. The middle date is the average (a 50% chance). For spring, the 10% date is a safer planting date: frost after it happens in about 1 year in 10. Light frost (36°F) can damage tender plants; a hard freeze (28°F) kills most annuals.

Spring dates: chance of a frost AFTER the date. Fall dates: chance of a frost BEFORE the date.
Temperature	Last spring: 90% / 50% / 10% chance	First fall: 10% / 50% / 90% chance	Growing season (50%)	Years with at least one
Light frost (36°F)	Jan 22 · Feb 19 · Mar 11	Nov 13 · Nov 27 · Dec 13	280 days	100%
Frost / freeze (32°F)	Dec 22 · Jan 24 · Feb 22	Nov 24 · Dec 10 · Jan 1	321 days	97%
Hard freeze (28°F)	Dec 11 · Jan 3 · Feb 8	Dec 3 · Dec 23 · Jan 28	357 days	63%

Where these dates come from

ZIP code 92277 is matched to the NOAA station Twentynine Palms, CA, 2.9 km away, at 1,975 ft elevation (59 ft lower than the ZIP code's center). Nearby stations for comparison:

Station	Elevation	Avg last frost	Avg first frost
Twentynine Palms, CA (used)	1,975 ft	Jan 24	Dec 10
Joshua Tree, CA	2,563 ft	Feb 28	Dec 1
Yucca Valley, CA	3,249 ft	Mar 14	Nov 28
Yucca Mesa, CA	3,445 ft	Feb 16	Dec 10

Frost dates near Twentynine Palms

Twentynine Palms, CA 92278 · last Jan 24, first Dec 10
Joshua Tree, CA 92252 · last Feb 28, first Dec 1
Yucca Valley, CA 92286 · last Mar 14, first Nov 28
Desert Hot Springs, CA 92241 · last Jan 9, first Jan 9
Pioneertown, CA 92268 · last Feb 16, first Dec 10
Indio, CA 92202 · last Jan 24, first Dec 10
Landers, CA 92285 · last Feb 16, first Dec 10
Thousand Palms, CA 92276 · last Jan 9, first Jan 9

Frequently asked questions

When is the last frost in Twentynine Palms, CA?: For ZIP code 92277, the average last spring frost (32°F) is January 24, based on NOAA 1991-2020 climate normals for the Twentynine Palms, CA weather station. There is a 1-in-10 chance of a frost after February 22.
When is the first frost in Twentynine Palms, CA?: The average first fall frost (32°F) is December 10. There is a 1-in-10 chance of frost by November 24, so tender plants are at risk from that point on.
How long is the growing season in 92277?: In half of years, the frost-free season (between the last and first 32°F frost) is at least 321 days long.
Are these frost dates a forecast?: No. They are 30-year averages and probabilities from NOAA weather station records. Use them to plan, then watch your local forecast before planting tender crops or leaving them uncovered.