Atwood, IL 61913 Frost Dates
Atwood, IL: when does the frost end?
Typically, the last spring freeze lands around 04/15, roughly 230 days out. Fall's first freeze usually shows up around 10/20, roughly 188 days after the last spring frost.
The USDA Plant Hardiness Zone Map puts Atwood 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 8 weeks until Atwood's first fall frost, a row cover or cold frame is what stretches the last few weeks of harvest here.
The actual range around Atwood's last frost
04/15 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 04/03 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 05/01 and only about 1 year in 10 sees frost after that.
Atwood against the rest of the dataset
Atwood's growing season runs about 188 days, ranking 22,107 of 40,283 US ZIP codes measured here, longest to shortest. Within IL, it ranks 692 of 1,548.
Learn more
Before leaning on 61913's figures: zone vs. frost date explains why Zone 6a and Atwood's frost date answer different questions, while the frost range explains how to read the range around Atwood's dates instead of trusting one.