Maryville, IL 62026 Frost Dates
When can you plant in Maryville, IL?
The last spring frost here typically falls around 04/04, about 219 days from today. The first fall frost typically arrives around 11/05, about 214 frost-free days later.
Zone 7a (0 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 Maryville, not a forecast for this year.
What to do before the first frost
About 10 weeks of growing season left in Maryville 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
04/04 is the middle of 30 years of NOAA records, not a promise. Plant by 03/18 and you're betting against frost in roughly 9 years out of 10. 04/19 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Maryville compares
Maryville's growing season runs about 214 days, ranking 14,243 of 40,283 US ZIP codes measured here, longest to shortest. Within IL, it ranks 17 of 1,548.
Learn more
zone vs. frost date covers why Zone 7a and Maryville's frost date answer different questions. the frost range covers how to read the range around Maryville's dates instead of trusting one.