Alsip, IL 60803 Frost Dates
Alsip, IL: when does the frost end?
Typically, the last spring freeze lands around 04/10, roughly 225 days out. Fall's first freeze usually shows up around 11/01, roughly 203 days after the last spring frost.
The USDA Plant Hardiness Zone Map puts Alsip in Zone 6a (-10 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 Alsip's first fall frost, a row cover or cold frame is what stretches the last few weeks of harvest here.
How much risk comes with planting early here
04/10 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 03/30 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 04/26 and only about 1 year in 10 sees frost after that.
Alsip against the rest of the dataset
About 203 days separate Alsip's last and first frost, putting it 16,859 of 40,283 ZIP codes nationally. Within IL, it ranks 152 of 1,548.
Learn more
Before leaning on 60803's figures: local microclimates explains what one yard in Alsip can differ from the 60803 normal, while zone vs. frost date explains why Zone 6a and Alsip's frost date answer different questions.