Fisher, IL 61843 Frost Dates
Frost dates for Fisher, IL, ZIP 61843
The last spring frost here typically falls around 04/21, about 236 days from today. The first fall frost typically arrives around 10/17, about 178 frost-free days later.
Fisher 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 Fisher 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.
The actual range around Fisher's last frost
04/21 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. 05/05 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Fisher compares
About 178 days separate Fisher's last and first frost, putting it 25,757 of 40,283 ZIP codes nationally. Within IL, it ranks 1,085 of 1,548.
Learn more
local microclimates explains what one yard in Fisher can differ from the 61843 normal, and zone vs. frost date explains why Zone 6a and Fisher's frost date answer different questions.