Wickenburg, AZ 85332 Frost Dates
85332, near Wickenburg, AZ: the frost window
Typically, the last spring freeze lands around 03/07, roughly 191 days out. Fall's first freeze usually shows up around 11/20, roughly 254 days after the last spring frost.
Wickenburg sits in USDA Zone 9a (20 to 25°F average annual minimum). The dates above are NOAA's 1991-2020 normal at the nearest reporting station, a 30-year average, not a forecast.
Stretching the season past the first frost
Wickenburg's growing season runs out in roughly 12 weeks — a cold frame or greenhouse kit is the usual way to keep cool-weather crops going past the first frost.
The actual range around Wickenburg's last frost
03/07 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 02/14 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 04/08 and only about 1 year in 10 sees frost after that.
Wickenburg against the rest of the dataset
About 254 days separate Wickenburg's last and first frost, putting it 7,021 of 40,283 ZIP codes nationally. Within AZ, it ranks 314 of 506.
Learn more
Two guides worth reading on 85332: local microclimates, on what one yard in Wickenburg can differ from the 85332 normal, and zone vs. frost date, on why Zone 9a and Wickenburg's frost date answer different questions.