New Haven, IL 62867 Frost Dates
New Haven, IL: when does the frost end?
Typically, the last spring freeze lands around 04/05, roughly 220 days out. Fall's first freeze usually shows up around 10/31, roughly 209 days after the last spring frost.
The USDA Plant Hardiness Zone Map puts New Haven in Zone 7a (0 to 5°F average annual minimum); frost dates are NOAA's 1991-2020 station normal, not this year's forecast.
Stretching the season past the first frost
With roughly 9 weeks until New Haven's first fall frost, a row cover or cold frame is what stretches the last few weeks of harvest here.
The actual range around New Haven's last frost
04/05 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 03/21 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 04/21 and only about 1 year in 10 sees frost after that.
New Haven against the rest of the dataset
About 209 days separate New Haven's last and first frost, putting it 15,395 of 40,283 ZIP codes nationally. Within IL, it ranks 50 of 1,548.
Learn more
Before leaning on 62867's figures: the frost range explains how to read the range around New Haven's dates instead of trusting one, while local microclimates explains what one yard in New Haven can differ from the 62867 normal.