Naperville, IL 60564 Frost Dates
When can you plant in Naperville, IL?
Around 04/19 is the usual last spring frost, about 234 days away. The first fall frost typically arrives around 10/23, about 185 frost-free days later.
Zone 5b (-15 to -10°F average annual minimum) comes from the USDA Plant Hardiness Zone Map; the frost dates above are the 1991-2020 normal at the nearest reporting NOAA station for Naperville, not a forecast for this year.
What to do before the first frost
About 8 weeks of growing season left in Naperville 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
04/19 is the middle of 30 years of NOAA records, not a promise. Plant by 04/05 and you're betting against frost in roughly 9 years out of 10. 05/04 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Naperville compares
At roughly 185 frost-free days, Naperville places 23,008 of 40,283 ZIP codes in this dataset. Within IL, it ranks 818 of 1,548.
Learn more
the frost range covers how to read the range around Naperville's dates instead of trusting one. local microclimates covers what one yard in Naperville can differ from the 60564 normal.