Goodfield, IL 61742 Frost Dates
Frost dates for Goodfield, IL, ZIP 61742
Around 04/21 is the usual last spring frost, about 236 days away. The first fall frost typically arrives around 10/17, about 178 frost-free days later.
Zone 5b (-15 to -10°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 Goodfield, not a forecast for this year.
What to do before the first frost
Zone 5b around Goodfield has about 7 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 Goodfield's last frost
04/21 is the middle of 30 years of NOAA records, not a promise. Plant by 04/07 and you're betting against frost in roughly 9 years out of 10. 05/07 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Goodfield compares
At roughly 178 frost-free days, Goodfield places 25,830 of 40,283 ZIP codes in this dataset. Within IL, it ranks 1,093 of 1,548.
Learn more
zone vs. frost date explains why Zone 5b and Goodfield's frost date answer different questions, and the frost range explains how to read the range around Goodfield's dates instead of trusting one.