St. Anne, IL 60964 Frost Dates
Frost dates for St. Anne, IL, ZIP 60964
The last spring frost here typically falls around 04/19, about 234 days from today. The first fall frost typically arrives around 10/24, about 188 frost-free days later.
The USDA Plant Hardiness Zone Map puts St. Anne in Zone 5b (-15 to -10°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 5b around St. Anne 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.
How much risk comes with planting early here
04/19 is the middle of 30 years of NOAA records, not a promise. Plant by 04/05 and you're betting against frost in roughly 9 years out of 10. 05/03 is the safer bet, historically only a 1-in-10 chance of frost that late.
How St. Anne compares
About 188 days separate St. Anne's last and first frost, putting it 22,106 of 40,283 ZIP codes nationally. Within IL, it ranks 691 of 1,548.
Learn more
local microclimates explains what one yard in St. Anne can differ from the 60964 normal, and zone vs. frost date explains why Zone 5b and St. Anne's frost date answer different questions.