Longview, IL 61852 Frost Dates
Frost dates for Longview, IL, ZIP 61852
Typically, the last spring freeze lands around 04/15, roughly 230 days out. The first fall frost typically arrives around 10/20, about 188 frost-free days later.
Zone 6a (-10 to -5°F average annual minimum) comes from the USDA Plant Hardiness Zone Map; the frost dates above are the 1991-2020 normal at the nearest reporting NOAA station for Longview, not a forecast for this year.
What to do before the first frost
Zone 6a around Longview 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 04/15 isn't a guarantee
04/15 is the middle of 30 years of NOAA records, not a promise. Plant by 04/03 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 Longview compares
About 188 days separate Longview's last and first frost, putting it 22,235 of 40,283 ZIP codes nationally. Within IL, it ranks 710 of 1,548.
Learn more
local microclimates explains what one yard in Longview can differ from the 61852 normal, and zone vs. frost date explains why Zone 6a and Longview's frost date answer different questions.