When is the last frost in Parker, AZ?

For ZIP code 85344, the average last spring frost (32°F) is January 12, based on NOAA 1991-2020 climate normals for the Parker, AZ weather station. There is a 1-in-10 chance of a frost after February 15.

When is the first frost in Parker, AZ?

The average first fall frost (32°F) is December 19. There is a 1-in-10 chance of frost by December 4, so tender plants are at risk from that point on.

How long is the growing season in 85344?

In half of years, the frost-free season (between the last and first 32°F frost) is at least 338 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 85344Parker, AZ

The average last spring frost in Parker is January 12 and the average first fall frost is December 19, giving a typical growing season of about 338 days. Dates are based on NOAA 1991-2020 climate normals.

Average last spring frost: Jan 12
Average first fall frost: Dec 19
Growing season: 338 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 9 · Feb 7 · Mar 3	Nov 24 · Dec 6 · Dec 22	302 days	100%
Frost / freeze (32°F)	Dec 20 · Jan 12 · Feb 15	Dec 4 · Dec 19 · Jan 10	338 days	88%
Hard freeze (28°F)	Dec 14 · Jan 1 · Feb 2	Dec 10 · Dec 26 · Jan 21	365 days	42%

Where these dates come from

ZIP code 85344 is matched to the NOAA station Parker, AZ, 0.5 km away, at 420 ft elevation (3 ft lower than the ZIP code's center). Nearby stations for comparison:

Station	Elevation	Avg last frost	Avg first frost
Parker, AZ (used)	420 ft	Jan 12	Dec 19
Parker Resrvoir, CA	738 ft	Jan 7	Dec 31
Bouse, AZ	925 ft	Feb 18	Nov 28
Lake Havasu City, AZ	449 ft	Jan 5	Dec 29

Frost dates near Parker

Earp, CA 92242 · last Jan 12, first Dec 19
Poston, AZ 85371 · last Jan 12, first Dec 19
Parker Dam, CA 92267 · last Jan 7, first Dec 31
Vidal, CA 92280 · last Jan 7, first Dec 31
Lake Havasu City, AZ 86406 · last Feb 18, first Dec 2
Bouse, AZ 85325 · last Feb 18, first Nov 28
Quartzsite, AZ 85346 · last Jan 28, first Dec 6
Ehrenberg, AZ 85334 · last Jan 25, first Dec 12

Frequently asked questions

When is the last frost in Parker, AZ?: For ZIP code 85344, the average last spring frost (32°F) is January 12, based on NOAA 1991-2020 climate normals for the Parker, AZ weather station. There is a 1-in-10 chance of a frost after February 15.
When is the first frost in Parker, AZ?: The average first fall frost (32°F) is December 19. There is a 1-in-10 chance of frost by December 4, so tender plants are at risk from that point on.
How long is the growing season in 85344?: In half of years, the frost-free season (between the last and first 32°F frost) is at least 338 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.