Quincy, IL 62301 Frost Dates
Frost dates for Quincy, IL, ZIP 62301
The last spring frost here typically falls around 04/14, about 229 days from today. The first fall frost typically arrives around 10/23, about 191 frost-free days later.
Quincy sits in USDA Zone 6a (-10 to -5°F average annual minimum). The dates above are NOAA's 1991-2020 normal at the nearest reporting station, a 30-year average, not a forecast.
What to do before the first frost
Zone 6a around Quincy 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.
The actual range around Quincy's last frost
04/14 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. 05/01 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Quincy compares
About 191 days separate Quincy's last and first frost, putting it 20,698 of 40,283 ZIP codes nationally. Within IL, it ranks 437 of 1,548.
Learn more
zone vs. frost date explains why Zone 6a and Quincy's frost date answer different questions, and the frost range explains how to read the range around Quincy's dates instead of trusting one.