Assumption, IL 62510 Frost Dates
When can you plant in Assumption, IL?
Typically, the last spring freeze lands around 04/14, roughly 229 days out. The first fall frost typically arrives around 10/24, about 192 frost-free days later.
Zone 6a (-10 to -5°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 Assumption, not a forecast for this year.
What to do before the first frost
About 8 weeks of growing season left in Assumption before the first fall frost — a cold frame or row cover can stretch harvest weeks past that date.
Why 04/14 isn't a guarantee
04/14 is the middle of 30 years of NOAA records, not a promise. Plant by 04/01 and you're betting against frost in roughly 9 years out of 10. 05/01 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Assumption compares
Assumption's growing season runs about 192 days, ranking 20,463 of 40,283 US ZIP codes measured here, longest to shortest. Within IL, it ranks 428 of 1,548.
Learn more
the frost range covers how to read the range around Assumption's dates instead of trusting one. local microclimates covers what one yard in Assumption can differ from the 62510 normal.