Guadalupe, AZ 85048 Frost Dates
Frost dates for Guadalupe, AZ, ZIP 85048
Typically, the last spring freeze lands around 01/21, roughly 146 days out. The first fall frost typically arrives around 12/16, about 331 frost-free days later.
The USDA Plant Hardiness Zone Map puts Guadalupe in Zone 9b (25 to 30°F average annual minimum); frost dates are NOAA's 1991-2020 station normal, not this year's forecast.
What to do before the first frost
Zone 9b around Guadalupe has about 16 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.
Why 01/21 isn't a guarantee
01/21 is the middle of 30 years of NOAA records, not a promise. Plant by 02/20 and you're betting against frost in roughly 9 years out of 10. 12/24 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Guadalupe compares
About 331 days separate Guadalupe's last and first frost, putting it 2,957 of 40,283 ZIP codes nationally. Within AZ, it ranks 186 of 506.
Learn more
local microclimates explains what one yard in Guadalupe can differ from the 85048 normal, and zone vs. frost date explains why Zone 9b and Guadalupe's frost date answer different questions.