Jewett, IL 62436 Frost Dates
62436, near Jewett, IL: the frost window
Around 04/13 is the usual last spring frost, about 228 days away. Fall's first freeze usually shows up around 10/22, roughly 190 days after the last spring frost.
The USDA Plant Hardiness Zone Map puts Jewett in Zone 6b (-5 to 0°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
Jewett'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.
The actual range around Jewett's last frost
04/13 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.
Jewett against the rest of the dataset
Jewett's growing season runs about 190 days, ranking 21,321 of 40,283 US ZIP codes measured here, longest to shortest. Within IL, it ranks 546 of 1,548.
Learn more
Two guides worth reading on 62436: the frost range, on how to read the range around Jewett's dates instead of trusting one, and local microclimates, on what one yard in Jewett can differ from the 62436 normal.