When is the last frost in Roosevelt, AZ?

For ZIP code 85545, the average last spring frost (32°F) is January 17, based on NOAA 1991-2020 climate normals for the Roosevelt 1 S, AZ weather station. There is a 1-in-10 chance of a frost after February 18.

When is the first frost in Roosevelt, AZ?

The average first fall frost (32°F) is December 25. There is a 1-in-10 chance of frost by December 5, so tender plants are at risk from that point on.

How long is the growing season in 85545?

In half of years, the frost-free season (between the last and first 32°F frost) is at least 342 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 85545Roosevelt, AZ

The average last spring frost in Roosevelt is January 17 and the average first fall frost is December 25, giving a typical growing season of about 342 days. Dates are based on NOAA 1991-2020 climate normals.

Average last spring frost: Jan 17
Average first fall frost: Dec 25
Growing season: 342 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 18 · Feb 16 · Mar 9	Nov 24 · Dec 8 · Dec 25	296 days	100%
Frost / freeze (32°F)	Dec 21 · Jan 17 · Feb 18	Dec 5 · Dec 25 · Jan 27	342 days	82%
Hard freeze (28°F)	Dec 21 · Jan 14 · Feb 12	Dec 19 · Jan 10 · Feb 6	365 days	25%

Where these dates come from

ZIP code 85545 is matched to the NOAA station Roosevelt 1 S, AZ, 12.5 km away, at 2,605 ft elevation (420 ft higher than the ZIP code's center). Nearby stations for comparison:

Station	Elevation	Avg last frost	Avg first frost
Roosevelt 1 S, AZ (used)	2,605 ft	Jan 17	Dec 25
Miami, AZ	3,560 ft	Feb 24	Dec 1
Globe #3, AZ	3,660 ft	Mar 11	Nov 21
Superior, AZ	2,860 ft	Jan 18	Dec 28

Frost dates near Roosevelt

Miami, AZ 85539 · last Feb 24, first Dec 1
Claypool, AZ 85532 · last Feb 24, first Dec 1
Globe, AZ 85501 · last Feb 24, first Dec 1
Tonto Basin, AZ 85553 · last Mar 7, first Nov 20
Tortilla Flat, AZ 85190 · last Feb 11, first Dec 10
Superior, AZ 85173 · last Jan 18, first Dec 28
Apache Junction, AZ 85117 · last Feb 11, first Dec 10
Gold Canyon, AZ 85118 · last Feb 11, first Dec 10

Frequently asked questions

When is the last frost in Roosevelt, AZ?: For ZIP code 85545, the average last spring frost (32°F) is January 17, based on NOAA 1991-2020 climate normals for the Roosevelt 1 S, AZ weather station. There is a 1-in-10 chance of a frost after February 18.
When is the first frost in Roosevelt, AZ?: The average first fall frost (32°F) is December 25. There is a 1-in-10 chance of frost by December 5, so tender plants are at risk from that point on.
How long is the growing season in 85545?: In half of years, the frost-free season (between the last and first 32°F frost) is at least 342 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.