Amboy, IL 61310 Frost Dates
Frost dates for Amboy, IL, ZIP 61310
The last spring frost here typically falls around 04/27, about 242 days from today. The first fall frost typically arrives around 10/12, about 167 frost-free days later.
Amboy sits in USDA Zone 5b (-15 to -10°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 5b around Amboy has about 6 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 Amboy's last frost
04/27 is the middle of 30 years of NOAA records, not a promise. Plant by 04/12 and you're betting against frost in roughly 9 years out of 10. 05/14 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Amboy compares
About 167 days separate Amboy's last and first frost, putting it 30,017 of 40,283 ZIP codes nationally. Within IL, it ranks 1,455 of 1,548.
Learn more
local microclimates explains what one yard in Amboy can differ from the 61310 normal, and zone vs. frost date explains why Zone 5b and Amboy's frost date answer different questions.