Sailor Springs, IL 62879 Frost Dates
Frost dates for Sailor Springs, IL, ZIP 62879
Typically, the last spring freeze lands around 04/09, roughly 224 days out. The first fall frost typically arrives around 10/24, about 198 frost-free days later.
Zone 6b (-5 to 0°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 Sailor Springs, not a forecast for this year.
What to do before the first frost
Zone 6b around Sailor 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.
Why 04/09 isn't a guarantee
04/09 is the middle of 30 years of NOAA records, not a promise. Plant by 03/29 and you're betting against frost in roughly 9 years out of 10. 04/23 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Sailor Springs compares
Sailor Springs's growing season runs about 198 days, ranking 18,564 of 40,283 US ZIP codes measured here, longest to shortest. Within IL, it ranks 311 of 1,548.
Learn more
local microclimates explains what one yard in Sailor Springs can differ from the 62879 normal, and zone vs. frost date explains why Zone 6b and Sailor Springs's frost date answer different questions.