Willow Springs, IL 60480 Frost Dates
Frost dates for Willow Springs, IL, ZIP 60480
Typically, the last spring freeze lands around 04/19, roughly 234 days out. The first fall frost typically arrives around 10/22, about 183 frost-free days later.
The USDA Plant Hardiness Zone Map puts Willow Springs in Zone 6a (-10 to -5°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 6a around Willow Springs 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 Willow Springs's last frost
04/19 is the middle of 30 years of NOAA records, not a promise. Plant by 04/06 and you're betting against frost in roughly 9 years out of 10. 05/05 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Willow Springs compares
About 183 days separate Willow Springs's last and first frost, putting it 23,833 of 40,283 ZIP codes nationally. Within IL, it ranks 884 of 1,548.
Learn more
zone vs. frost date explains why Zone 6a and Willow Springs's frost date answer different questions, and the frost range explains how to read the range around Willow Springs's dates instead of trusting one.