Cypress, IL 62923 Frost Dates
Frost dates for Cypress, IL, ZIP 62923
Typically, the last spring freeze lands around 04/14, roughly 229 days out. The first fall frost typically arrives around 10/21, about 189 frost-free days later.
Cypress sits in USDA Zone 7a (0 to 5°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 7a around Cypress 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.
Why 04/14 isn't a guarantee
04/14 is the middle of 30 years of NOAA records, not a promise. Plant by 03/28 and you're betting against frost in roughly 9 years out of 10. 04/30 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Cypress compares
About 189 days separate Cypress's last and first frost, putting it 21,739 of 40,283 ZIP codes nationally. Within IL, it ranks 648 of 1,548.
Learn more
local microclimates explains what one yard in Cypress can differ from the 62923 normal, and zone vs. frost date explains why Zone 7a and Cypress's frost date answer different questions.