Miami, AZ 85539 Frost Dates
Frost dates for Miami, AZ, ZIP 85539
The last spring frost here typically falls around 02/24, about 180 days from today. The first fall frost typically arrives around 12/01, about 279 frost-free days later.
The USDA Plant Hardiness Zone Map puts Miami in Zone 8a (10 to 15°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 8a around Miami has about 14 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 02/24 isn't a guarantee
02/24 is the middle of 30 years of NOAA records, not a promise. Plant by 01/30 and you're betting against frost in roughly 9 years out of 10. 03/18 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Miami compares
About 279 days separate Miami's last and first frost, putting it 4,902 of 40,283 ZIP codes nationally. Within AZ, it ranks 300 of 506.
Learn more
local microclimates explains what one yard in Miami can differ from the 85539 normal, and zone vs. frost date explains why Zone 8a and Miami's frost date answer different questions.