Havana, IL 62644 Frost Dates
When can you plant in Havana, IL?
Typically, the last spring freeze lands around 04/17, roughly 232 days out. The first fall frost typically arrives around 10/19, about 185 frost-free days later.
The USDA Plant Hardiness Zone Map puts Havana in Zone 6a (-10 to -5°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 Havana before the first fall frost — a cold frame or row cover can stretch harvest weeks past that date.
The actual range around Havana's last frost
04/17 is the middle of 30 years of NOAA records, not a promise. Plant by 04/02 and you're betting against frost in roughly 9 years out of 10. 05/03 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Havana compares
At roughly 185 frost-free days, Havana places 23,169 of 40,283 ZIP codes in this dataset. Within IL, it ranks 829 of 1,548.
Learn more
the frost range covers how to read the range around Havana's dates instead of trusting one. local microclimates covers what one yard in Havana can differ from the 62644 normal.