Berkeley, IL 60163 Frost Dates
Frost dates for Berkeley, IL, ZIP 60163
Typically, the last spring freeze lands around 04/16, roughly 231 days out. The first fall frost typically arrives around 10/28, about 193 frost-free days later.
Zone 6a (-10 to -5°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 Berkeley, not a forecast for this year.
What to do before the first frost
Zone 6a around Berkeley has about 9 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.
Why 04/16 isn't a guarantee
04/16 is the middle of 30 years of NOAA records, not a promise. Plant by 04/03 and you're betting against frost in roughly 9 years out of 10. 05/01 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Berkeley compares
At roughly 193 frost-free days, Berkeley places 19,844 of 40,283 ZIP codes in this dataset. Within IL, it ranks 396 of 1,548.
Learn more
local microclimates explains what one yard in Berkeley can differ from the 60163 normal, and zone vs. frost date explains why Zone 6a and Berkeley's frost date answer different questions.