Mansfield, IL 61854 Frost Dates
When can you plant in Mansfield, IL?
The last spring frost here typically falls around 04/23, about 238 days from today. The first fall frost typically arrives around 10/13, about 170 frost-free days later.
The USDA Plant Hardiness Zone Map puts Mansfield 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 7 weeks of growing season left in Mansfield before the first fall frost — a cold frame or row cover can stretch harvest weeks past that date.
Why 04/23 isn't a guarantee
04/23 is the middle of 30 years of NOAA records, not a promise. Plant by 04/09 and you're betting against frost in roughly 9 years out of 10. 05/09 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Mansfield compares
At roughly 170 frost-free days, Mansfield places 29,128 of 40,283 ZIP codes in this dataset. Within IL, it ranks 1,402 of 1,548.
Learn more
local microclimates covers what one yard in Mansfield can differ from the 61854 normal. zone vs. frost date covers why Zone 6a and Mansfield's frost date answer different questions.