Spring Bay, IL 61552 Frost Dates
When can you plant in Spring Bay, IL?
The last spring frost here typically falls around 04/16, about 231 days from today. The first fall frost typically arrives around 10/23, about 189 frost-free days later.
The USDA Plant Hardiness Zone Map puts Spring Bay 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
About 8 weeks of growing season left in Spring Bay before the first fall frost — a cold frame or row cover can stretch harvest weeks past that date.
Why 04/16 isn't a guarantee
04/16 is the middle of 30 years of NOAA records, not a promise. Plant by 04/02 and you're betting against frost in roughly 9 years out of 10. 05/04 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Spring Bay compares
At roughly 189 frost-free days, Spring Bay places 21,708 of 40,283 ZIP codes in this dataset. Within IL, it ranks 631 of 1,548.
Learn more
the frost range covers how to read the range around Spring Bay's dates instead of trusting one. local microclimates covers what one yard in Spring Bay can differ from the 61552 normal.