When is the last frost in Winterhaven, CA?

For ZIP code 92283, the average last spring frost (32°F) is January 4, based on NOAA 1991-2020 climate normals for the Yuma Proving Ground, AZ weather station. There is a 1-in-10 chance of a frost after February 9.

When is the first frost in Winterhaven, CA?

The average first fall frost (32°F) is December 25. There is a 1-in-10 chance of frost by December 3, so tender plants are at risk from that point on.

How long is the growing season in 92283?

In half of years, the frost-free season (between the last and first 32°F frost) is at least 361 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 92283Winterhaven, CA

The average last spring frost in Winterhaven is January 4 and the average first fall frost is December 25, giving a typical growing season of about 361 days. Dates are based on NOAA 1991-2020 climate normals.

Average last spring frost: Jan 4
Average first fall frost: Dec 25
Growing season: 361 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 23 · Jan 18 · Feb 18	Nov 25 · Dec 13 · Dec 29	327 days	96%
Frost / freeze (32°F)	Dec 11 · Jan 4 · Feb 9	Dec 3 · Dec 25 · Jan 25	361 days	57%
Hard freeze (28°F)	Dec 20 · Jan 9 · Feb 13	Dec 20 · Jan 9 · Feb 12	365 days	13%

Where these dates come from

ZIP code 92283 is matched to the NOAA station Yuma Proving Ground, AZ, 31.7 km away, at 324 ft elevation (463 ft lower than the ZIP code's center). Nearby stations for comparison:

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

Frost dates near Winterhaven

Bard, CA 92222 · last Jan 8, first Dec 28
Yuma, AZ 85369 · last Jan 8, first Dec 28
Cibola, AZ 85328 · last Jan 25, first Dec 12
Palo Verde, CA 92266 · last Jan 25, first Dec 12
Somerton, AZ 85350 · last —, first —
Gadsden, AZ 85336 · last —, first —
San Luis, AZ 85349 · last —, first —
Wellton, AZ 85356 · last Feb 13, first Dec 1

Frequently asked questions

When is the last frost in Winterhaven, CA?: For ZIP code 92283, the average last spring frost (32°F) is January 4, based on NOAA 1991-2020 climate normals for the Yuma Proving Ground, AZ weather station. There is a 1-in-10 chance of a frost after February 9.
When is the first frost in Winterhaven, CA?: The average first fall frost (32°F) is December 25. There is a 1-in-10 chance of frost by December 3, so tender plants are at risk from that point on.
How long is the growing season in 92283?: In half of years, the frost-free season (between the last and first 32°F frost) is at least 361 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.