Palmyra, IL 62674 Frost Dates
Frost dates for Palmyra, IL, ZIP 62674
Around 04/14 is the usual last spring frost, about 229 days away. The first fall frost typically arrives around 10/21, about 188 frost-free days later.
The USDA Plant Hardiness Zone Map puts Palmyra in Zone 6b (-5 to 0°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 6b around Palmyra has about 8 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
04/14 is the middle of 30 years of NOAA records, not a promise. Plant by 03/31 and you're betting against frost in roughly 9 years out of 10. 04/30 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Palmyra compares
At roughly 188 frost-free days, Palmyra places 22,153 of 40,283 ZIP codes in this dataset. Within IL, it ranks 695 of 1,548.
Learn more
zone vs. frost date explains why Zone 6b and Palmyra's frost date answer different questions, and the frost range explains how to read the range around Palmyra's dates instead of trusting one.