Martinsville, IL 62442 Frost Dates
62442, near Martinsville, IL: the frost window
Around 04/14 is the usual last spring frost, about 229 days away. Fall's first freeze usually shows up around 10/20, roughly 187 days after the last spring frost.
The USDA Plant Hardiness Zone Map puts Martinsville 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
Martinsville'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 Martinsville's last frost
04/14 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 04/02 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 04/30 and only about 1 year in 10 sees frost after that.
Martinsville against the rest of the dataset
At roughly 187 frost-free days, Martinsville places 22,491 of 40,283 ZIP codes in this dataset. Within IL, it ranks 768 of 1,548.
Learn more
Two guides worth reading on 62442: the frost range, on how to read the range around Martinsville's dates instead of trusting one, and local microclimates, on what one yard in Martinsville can differ from the 62442 normal.