Troy Grove, IL 61372 Frost Dates
When can you plant in Troy Grove, IL?
Around 04/24 is the usual last spring frost, about 239 days away. The first fall frost typically arrives around 10/18, about 176 frost-free days later.
The USDA Plant Hardiness Zone Map puts Troy Grove in Zone 5b (-15 to -10°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 Troy Grove before the first fall frost — a cold frame or row cover can stretch harvest weeks past that date.
The actual range around Troy Grove's last frost
04/24 is the middle of 30 years of NOAA records, not a promise. Plant by 04/11 and you're betting against frost in roughly 9 years out of 10. 05/08 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Troy Grove compares
Troy Grove's growing season runs about 176 days, ranking 26,640 of 40,283 US ZIP codes measured here, longest to shortest. Within IL, it ranks 1,197 of 1,548.
Learn more
local microclimates covers what one yard in Troy Grove can differ from the 61372 normal. zone vs. frost date covers why Zone 5b and Troy Grove's frost date answer different questions.