When is the last frost in Blythe, CA?

For ZIP code 92226, the average last spring frost (32°F) is January 25, based on NOAA 1991-2020 climate normals for the Blythe, CA weather station. There is a 1-in-10 chance of a frost after February 24.

When is the first frost in Blythe, CA?

The average first fall frost (32°F) is December 12. There is a 1-in-10 chance of frost by November 28, so tender plants are at risk from that point on.

How long is the growing season in 92226?

In half of years, the frost-free season (between the last and first 32°F frost) is at least 325 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 92226Blythe, CA

The average last spring frost in Blythe is January 25 and the average first fall frost is December 12, giving a typical growing season of about 325 days. Dates are based on NOAA 1991-2020 climate normals.

Average last spring frost: Jan 25
Average first fall frost: Dec 12
Growing season: 325 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 25 · Feb 21 · Mar 10	Nov 16 · Dec 1 · Dec 16	283 days	100%
Frost / freeze (32°F)	Dec 29 · Jan 25 · Feb 24	Nov 28 · Dec 12 · Jan 3	325 days	96%
Hard freeze (28°F)	Dec 10 · Dec 30 · Jan 30	Dec 5 · Dec 22 · Jan 11	359 days	62%

Where these dates come from

ZIP code 92226 is matched to the NOAA station Blythe, CA, 5.4 km away, at 268 ft elevation (9 ft higher than the ZIP code's center). Nearby stations for comparison:

Station	Elevation	Avg last frost	Avg first frost
Blythe, CA (used)	268 ft	Jan 25	Dec 12
Blythe Ap, CA	395 ft	Jan 5	Dec 21
Ehrenberg 2 E, AZ	465 ft	Jan 4	Dec 19
Quartzsite, AZ	875 ft	Jan 28	Dec 6

Frost dates near Blythe

Blythe, CA 92225 · last Jan 25, first Dec 12
Ehrenberg, AZ 85334 · last Jan 25, first Dec 12
Palo Verde, CA 92266 · last Jan 25, first Dec 12
Cibola, AZ 85328 · last Jan 25, first Dec 12
Quartzsite, AZ 85359 · last Jan 28, first Dec 6
Poston, AZ 85371 · last Jan 12, first Dec 19
Vidal, CA 92280 · last Jan 7, first Dec 31
Winterhaven, CA 92283 · last Jan 4, first Dec 25

Frequently asked questions

When is the last frost in Blythe, CA?: For ZIP code 92226, the average last spring frost (32°F) is January 25, based on NOAA 1991-2020 climate normals for the Blythe, CA weather station. There is a 1-in-10 chance of a frost after February 24.
When is the first frost in Blythe, CA?: The average first fall frost (32°F) is December 12. There is a 1-in-10 chance of frost by November 28, so tender plants are at risk from that point on.
How long is the growing season in 92226?: In half of years, the frost-free season (between the last and first 32°F frost) is at least 325 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.