Mapleton, IL 61547 Frost Dates
When can you plant in Mapleton, IL?
Typically, the last spring freeze lands around 04/16, roughly 231 days out. The first fall frost typically arrives around 10/23, about 189 frost-free days later.
Mapleton sits in USDA Zone 6a (-10 to -5°F average annual minimum). The dates above are NOAA's 1991-2020 normal at the nearest reporting station, a 30-year average, not a forecast.
What to do before the first frost
About 8 weeks of growing season left in Mapleton before the first fall frost — a cold frame or row cover can stretch harvest weeks past that date.
The actual range around Mapleton's last frost
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 Mapleton compares
At roughly 189 frost-free days, Mapleton places 21,734 of 40,283 ZIP codes in this dataset. Within IL, it ranks 646 of 1,548.
Learn more
zone vs. frost date covers why Zone 6a and Mapleton's frost date answer different questions. the frost range covers how to read the range around Mapleton's dates instead of trusting one.