Newton, IL 62448 Frost Dates
Frost dates for Newton, IL, ZIP 62448
Around 04/13 is the usual last spring frost, about 228 days away. The first fall frost typically arrives around 10/22, about 190 frost-free days later.
The USDA Plant Hardiness Zone Map puts Newton in Zone 6b (-5 to 0°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 6b around Newton 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 Newton's last frost
04/13 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. 04/29 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Newton compares
At roughly 190 frost-free days, Newton places 21,170 of 40,283 ZIP codes in this dataset. Within IL, it ranks 509 of 1,548.
Learn more
local microclimates explains what one yard in Newton can differ from the 62448 normal, and zone vs. frost date explains why Zone 6b and Newton's frost date answer different questions.