Hanover Park, IL 60133 Frost Dates
When can you plant in Hanover Park, IL?
Around 04/30 is the usual last spring frost, about 245 days away. The first fall frost typically arrives around 10/13, about 163 frost-free days later.
The USDA Plant Hardiness Zone Map puts Hanover Park in Zone 5b (-15 to -10°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
About 7 weeks of growing season left in Hanover Park before the first fall frost — a cold frame or row cover can stretch harvest weeks past that date.
How much risk comes with planting early here
04/30 is the middle of 30 years of NOAA records, not a promise. Plant by 04/17 and you're betting against frost in roughly 9 years out of 10. 05/16 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Hanover Park compares
About 163 days separate Hanover Park's last and first frost, putting it 31,319 of 40,283 ZIP codes nationally. Within IL, it ranks 1,517 of 1,548.
Learn more
zone vs. frost date covers why Zone 5b and Hanover Park's frost date answer different questions. the frost range covers how to read the range around Hanover Park's dates instead of trusting one.