Morrisonville, IL 62546 Frost Dates
62546, near Morrisonville, IL: the frost window
The last spring frost here typically falls around 04/12, about 227 days from today. Fall's first freeze usually shows up around 10/20, roughly 190 days after the last spring frost.
Morrisonville sits in USDA Zone 6a (-10 to -5°F average annual minimum). The dates above are NOAA's 1991-2020 normal at the nearest reporting station, a 30-year average, not a forecast.
Stretching the season past the first frost
Morrisonville's growing season runs out in roughly 8 weeks — a cold frame or greenhouse kit is the usual way to keep cool-weather crops going past the first frost.
How much risk comes with planting early here
04/12 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 03/29 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 04/27 and only about 1 year in 10 sees frost after that.
Morrisonville against the rest of the dataset
About 190 days separate Morrisonville's last and first frost, putting it 21,237 of 40,283 ZIP codes nationally. Within IL, it ranks 522 of 1,548.
Learn more
Two guides worth reading on 62546: zone vs. frost date, on why Zone 6a and Morrisonville's frost date answer different questions, and the frost range, on how to read the range around Morrisonville's dates instead of trusting one.