Washington Park, IL 62204 Frost Dates
Frost dates for Washington Park, IL, ZIP 62204
The last spring frost here typically falls around 04/08, about 223 days from today. The first fall frost typically arrives around 10/26, about 200 frost-free days later.
Zone 7a (0 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 Washington Park, not a forecast for this year.
What to do before the first frost
Zone 7a around Washington Park has about 8 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
04/08 is the middle of 30 years of NOAA records, not a promise. Plant by 03/23 and you're betting against frost in roughly 9 years out of 10. 04/23 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Washington Park compares
About 200 days separate Washington Park's last and first frost, putting it 17,801 of 40,283 ZIP codes nationally. Within IL, it ranks 282 of 1,548.
Learn more
local microclimates explains what one yard in Washington Park can differ from the 62204 normal, and zone vs. frost date explains why Zone 7a and Washington Park's frost date answer different questions.