Andalusia, IL 61284 Frost Dates
Frost dates for Andalusia, IL, ZIP 61284
Around 04/24 is the usual last spring frost, about 239 days away. The first fall frost typically arrives around 10/18, about 176 frost-free days later.
Andalusia 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 Andalusia 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.
How much risk comes with planting early here
04/24 is the middle of 30 years of NOAA records, not a promise. Plant by 04/09 and you're betting against frost in roughly 9 years out of 10. 05/09 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Andalusia compares
Andalusia's growing season runs about 176 days, ranking 26,530 of 40,283 US ZIP codes measured here, longest to shortest. Within IL, it ranks 1,185 of 1,548.
Learn more
the frost range explains how to read the range around Andalusia's dates instead of trusting one, and local microclimates explains what one yard in Andalusia can differ from the 61284 normal.