Pleasant Plains, IL 62677 Frost Dates
62677, near Pleasant Plains, IL: the frost window
The last spring frost here typically falls around 04/14, about 229 days from today. Fall's first freeze usually shows up around 10/20, roughly 187 days after the last spring frost.
Zone 6a (-10 to -5°F average annual minimum) comes from the USDA Plant Hardiness Zone Map; the frost dates above are the 1991-2020 normal at the nearest reporting NOAA station for Pleasant Plains, not a forecast for this year.
Stretching the season past the first frost
Pleasant Plains'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.
Why 04/14 isn't a guarantee
04/14 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 04/01 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 04/29 and only about 1 year in 10 sees frost after that.
Pleasant Plains against the rest of the dataset
Pleasant Plains's growing season runs about 187 days, ranking 22,509 of 40,283 US ZIP codes measured here, longest to shortest. Within IL, it ranks 773 of 1,548.
Learn more
Two guides worth reading on 62677: zone vs. frost date, on why Zone 6a and Pleasant Plains's frost date answer different questions, and the frost range, on how to read the range around Pleasant Plains's dates instead of trusting one.