Martinton, IL 60951 Frost Dates
Frost dates for Martinton, IL, ZIP 60951
The last spring frost here typically falls around 04/24, about 239 days from today. The first fall frost typically arrives around 10/16, about 174 frost-free days later.
The USDA Plant Hardiness Zone Map puts Martinton 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
Zone 5b around Martinton has about 7 weeks left before the first fall frost — that's the usual window to get a cold frame up if you want to keep harvesting past it.
How much risk comes with planting early here
04/24 is the middle of 30 years of NOAA records, not a promise. Plant by 04/10 and you're betting against frost in roughly 9 years out of 10. 05/10 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Martinton compares
Martinton's growing season runs about 174 days, ranking 27,613 of 40,283 US ZIP codes measured here, longest to shortest. Within IL, it ranks 1,269 of 1,548.
Learn more
zone vs. frost date explains why Zone 5b and Martinton's frost date answer different questions, and the frost range explains how to read the range around Martinton's dates instead of trusting one.