When is the last frost in Yuma, AZ?

For ZIP code 85365, the average last spring frost (32°F) is January 8, based on NOAA 1991-2020 climate normals for the Yuma Quartermaster Depot, AZ weather station. There is a 1-in-10 chance of a frost after February 19.

When is the first frost in Yuma, AZ?

The average first fall frost (32°F) is December 28. There is a 1-in-10 chance of frost by December 11, so tender plants are at risk from that point on.

How long is the growing season in 85365?

In half of years, the frost-free season (between the last and first 32°F frost) is at least 362 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 85365Yuma, AZ

The average last spring frost in Yuma is January 8 and the average first fall frost is December 28, giving a typical growing season of about 362 days. Dates are based on NOAA 1991-2020 climate normals.

Average last spring frost: Jan 8
Average first fall frost: Dec 28
Growing season: 362 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)	Dec 25 · Jan 28 · Feb 28	Nov 29 · Dec 16 · Jan 5	324 days	96%
Frost / freeze (32°F)	Dec 17 · Jan 8 · Feb 19	Dec 11 · Dec 28 · Feb 7	362 days	57%
Hard freeze (28°F)	Dec 19 · Jan 1 · Feb 16	Dec 16 · Dec 31 · Feb 10	365 days	19%

Where these dates come from

ZIP code 85365 is matched to the NOAA station Yuma Quartermaster Depot, AZ, 12.4 km away, at 160 ft elevation (9 ft higher than the ZIP code's center). Nearby stations for comparison:

Station	Elevation	Avg last frost	Avg first frost
Yuma Quartermaster Depot, AZ (used)	160 ft	Jan 8	Dec 28
Yuma Mcas, AZ	213 ft	—	—
Yuma Proving Ground, AZ	324 ft	Jan 4	Dec 25
Yuma 27 Ene, AZ	620 ft	Jan 11	Dec 21

Frost dates near Yuma

Yuma, AZ 85367 · last Jan 4, first Dec 25
Bard, CA 92222 · last Jan 8, first Dec 28
Somerton, AZ 85350 · last —, first —
Wellton, AZ 85356 · last Feb 13, first Dec 1
Gadsden, AZ 85336 · last —, first —
Winterhaven, CA 92283 · last Jan 4, first Dec 25
San Luis, AZ 85349 · last —, first —
Roll, AZ 85347 · last Feb 13, first Dec 1

Frequently asked questions

When is the last frost in Yuma, AZ?: For ZIP code 85365, the average last spring frost (32°F) is January 8, based on NOAA 1991-2020 climate normals for the Yuma Quartermaster Depot, AZ weather station. There is a 1-in-10 chance of a frost after February 19.
When is the first frost in Yuma, AZ?: The average first fall frost (32°F) is December 28. There is a 1-in-10 chance of frost by December 11, so tender plants are at risk from that point on.
How long is the growing season in 85365?: In half of years, the frost-free season (between the last and first 32°F frost) is at least 362 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.