When is the last frost in Wittmann, AZ?

For ZIP code 85361, the average last spring frost (32°F) is February 5, based on NOAA 1991-2020 climate normals for the Wittmann 1Se, AZ weather station. There is a 1-in-10 chance of a frost after March 3.

When is the first frost in Wittmann, AZ?

The average first fall frost (32°F) is December 11. There is a 1-in-10 chance of frost by November 20, so tender plants are at risk from that point on.

How long is the growing season in 85361?

In half of years, the frost-free season (between the last and first 32°F frost) is at least 306 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 85361Wittmann, AZ

The average last spring frost in Wittmann is February 5 and the average first fall frost is December 11, giving a typical growing season of about 306 days. Dates are based on NOAA 1991-2020 climate normals.

Average last spring frost: Feb 5
Average first fall frost: Dec 11
Growing season: 306 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)	Feb 6 · Mar 4 · Apr 2	Nov 8 · Nov 26 · Dec 14	266 days	100%
Frost / freeze (32°F)	Jan 6 · Feb 5 · Mar 3	Nov 20 · Dec 11 · Jan 2	306 days	99%
Hard freeze (28°F)	Dec 14 · Jan 15 · Feb 12	Dec 4 · Dec 27 · Jan 28	345 days	76%

Where these dates come from

ZIP code 85361 is matched to the NOAA station Wittmann 1Se, AZ, 8.6 km away, at 1,683 ft elevation (33 ft lower than the ZIP code's center). Nearby stations for comparison:

Station	Elevation	Avg last frost	Avg first frost
Wittmann 1Se, AZ (used)	1,683 ft	Feb 5	Dec 11
Wickenburg, AZ	2,095 ft	Mar 7	Nov 20
Castle Hot Springs, AZ	1,990 ft	Jan 15	Dec 22
Youngtown, AZ	1,135 ft	Jan 20	Dec 15

Frost dates near Wittmann

Morristown, AZ 85342 · last Mar 7, first Nov 20
Surprise, AZ 85387 · last Feb 5, first Dec 11
Sun City West, AZ 85375 · last Jan 20, first Dec 15
Wickenburg, AZ 85358 · last Mar 7, first Nov 20
Waddell, AZ 85355 · last Jan 20, first Dec 15
Sun City, AZ 85373 · last Jan 20, first Dec 15
El Mirage, AZ 85335 · last Jan 20, first Dec 15
Litchfield Park, AZ 85340 · last Jan 7, first Dec 24

Frequently asked questions

When is the last frost in Wittmann, AZ?: For ZIP code 85361, the average last spring frost (32°F) is February 5, based on NOAA 1991-2020 climate normals for the Wittmann 1Se, AZ weather station. There is a 1-in-10 chance of a frost after March 3.
When is the first frost in Wittmann, AZ?: The average first fall frost (32°F) is December 11. There is a 1-in-10 chance of frost by November 20, so tender plants are at risk from that point on.
How long is the growing season in 85361?: In half of years, the frost-free season (between the last and first 32°F frost) is at least 306 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.