Willcox, AZ 85606 Frost Dates
When can you plant in Willcox, AZ?
Around 04/14 is the usual last spring frost, about 229 days away. The first fall frost typically arrives around 11/02, about 200 frost-free days later.
Zone 8b (15 to 20°F average annual minimum) comes from the USDA Plant Hardiness Zone Map; the frost dates above are the 1991-2020 normal at the nearest reporting NOAA station for Willcox, not a forecast for this year.
What to do before the first frost
About 9 weeks of growing season left in Willcox before the first fall frost — a cold frame or row cover can stretch harvest weeks past that date.
How much risk comes with planting early here
04/14 is the middle of 30 years of NOAA records, not a promise. Plant by 03/28 and you're betting against frost in roughly 9 years out of 10. 04/30 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Willcox compares
At roughly 200 frost-free days, Willcox places 17,789 of 40,283 ZIP codes in this dataset. Within AZ, it ranks 385 of 506.
Learn more
zone vs. frost date covers why Zone 8b and Willcox's frost date answer different questions. the frost range covers how to read the range around Willcox's dates instead of trusting one.