Tolleson, AZ 85392 Frost Dates
Frost dates for Tolleson, AZ, ZIP 85392
Typically, the last spring freeze lands around 01/07, roughly 132 days out. The first fall frost typically arrives around 12/24, about 351 frost-free days later.
Tolleson sits in USDA Zone 9b (25 to 30°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.
What to do before the first frost
Zone 9b around Tolleson has about 17 weeks left before the first fall frost — that's the usual window to get a cold frame up if you want to keep harvesting past it.
How much risk comes with planting early here
01/07 is the middle of 30 years of NOAA records, not a promise. Plant by 02/05 and you're betting against frost in roughly 9 years out of 10. 12/17 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Tolleson compares
About 351 days separate Tolleson's last and first frost, putting it 2,307 of 40,283 ZIP codes nationally. Within AZ, it ranks 69 of 506.
Learn more
zone vs. frost date explains why Zone 9b and Tolleson's frost date answer different questions, and the frost range explains how to read the range around Tolleson's dates instead of trusting one.