Niantic, IL 62537 Frost Dates
Frost dates for Niantic, IL, ZIP 62537
Typically, the last spring freeze lands around 04/14, roughly 229 days out. The first fall frost typically arrives around 10/24, about 192 frost-free days later.
Niantic sits in USDA Zone 6a (-10 to -5°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 6a around Niantic 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.
Why 04/14 isn't a guarantee
04/14 is the middle of 30 years of NOAA records, not a promise. Plant by 04/01 and you're betting against frost in roughly 9 years out of 10. 05/01 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Niantic compares
About 192 days separate Niantic's last and first frost, putting it 20,511 of 40,283 ZIP codes nationally. Within IL, it ranks 433 of 1,548.
Learn more
local microclimates explains what one yard in Niantic can differ from the 62537 normal, and zone vs. frost date explains why Zone 6a and Niantic's frost date answer different questions.