La Rose, IL 61541 Frost Dates
61541, near La Rose, IL: the frost window
Around 04/20 is the usual last spring frost, about 235 days away. Fall's first freeze usually shows up around 10/17, roughly 178 days after the last spring frost.
The USDA Plant Hardiness Zone Map puts La Rose in Zone 5b (-15 to -10°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
La Rose's growing season runs out in roughly 7 weeks — a cold frame or greenhouse kit is the usual way to keep cool-weather crops going past the first frost.
The actual range around La Rose's last frost
04/20 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 04/05 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 05/07 and only about 1 year in 10 sees frost after that.
La Rose against the rest of the dataset
About 178 days separate La Rose's last and first frost, putting it 25,942 of 40,283 ZIP codes nationally. Within IL, it ranks 1,113 of 1,548.
Learn more
Two guides worth reading on 61541: local microclimates, on what one yard in La Rose can differ from the 61541 normal, and zone vs. frost date, on why Zone 5b and La Rose's frost date answer different questions.