Atalissa, IA 52720 Frost Dates
Frost dates for Atalissa, IA, ZIP 52720
Around 04/18 is the usual last spring frost, about 233 days away. The first fall frost typically arrives around 10/22, about 184 frost-free days later.
Atalissa sits in USDA Zone 5b (-15 to -10°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 5b around Atalissa has about 8 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.
The actual range around Atalissa's last frost
04/18 is the middle of 30 years of NOAA records, not a promise. Plant by 04/04 and you're betting against frost in roughly 9 years out of 10. 05/02 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Atalissa compares
At roughly 184 frost-free days, Atalissa places 23,646 of 40,283 ZIP codes in this dataset. Within IA, it ranks 76 of 1,042.
Learn more
local microclimates explains what one yard in Atalissa can differ from the 52720 normal, and zone vs. frost date explains why Zone 5b and Atalissa's frost date answer different questions.