Jerome, IL 62711 Frost Dates
When can you plant in Jerome, IL?
The last spring frost here typically falls around 04/14, about 229 days from today. The first fall frost typically arrives around 10/20, about 187 frost-free days later.
The USDA Plant Hardiness Zone Map puts Jerome 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 Jerome before the first fall frost — a cold frame or row cover can stretch harvest weeks past that date.
How much risk comes with planting early here
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. 04/29 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Jerome compares
Jerome's growing season runs about 187 days, ranking 22,438 of 40,283 US ZIP codes measured here, longest to shortest. Within IL, it ranks 729 of 1,548.
Learn more
the frost range covers how to read the range around Jerome's dates instead of trusting one. local microclimates covers what one yard in Jerome can differ from the 62711 normal.