Merrionette Park, IL 60655 Frost Dates
Frost dates for Merrionette Park, IL, ZIP 60655
Typically, the last spring freeze lands around 04/10, roughly 225 days out. The first fall frost typically arrives around 11/01, about 203 frost-free days later.
The USDA Plant Hardiness Zone Map puts Merrionette Park 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
Zone 6a around Merrionette Park has about 9 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.
The actual range around Merrionette Park's last frost
04/10 is the middle of 30 years of NOAA records, not a promise. Plant by 03/30 and you're betting against frost in roughly 9 years out of 10. 04/26 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Merrionette Park compares
About 203 days separate Merrionette Park's last and first frost, putting it 16,943 of 40,283 ZIP codes nationally. Within IL, it ranks 168 of 1,548.
Learn more
the frost range explains how to read the range around Merrionette Park's dates instead of trusting one, and local microclimates explains what one yard in Merrionette Park can differ from the 60655 normal.