Marengo, OH 43334 Frost Dates
43334, near Marengo, OH: the frost window
Around 04/27 is the usual last spring frost, about 242 days away. Fall's first freeze usually shows up around 10/17, roughly 172 days after the last spring frost.
The USDA Plant Hardiness Zone Map puts Marengo in Zone 6a (-10 to -5°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
Marengo'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 Marengo's last frost
04/27 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 04/13 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 05/13 and only about 1 year in 10 sees frost after that.
Marengo against the rest of the dataset
At roughly 172 frost-free days, Marengo places 28,507 of 40,283 ZIP codes in this dataset. Within OH, it ranks 1,120 of 1,383.
Learn more
Two guides worth reading on 43334: zone vs. frost date, on why Zone 6a and Marengo's frost date answer different questions, and the frost range, on how to read the range around Marengo's dates instead of trusting one.