Ossian, IN 46777 Frost Dates
Ossian, IN: when does the frost end?
Typically, the last spring freeze lands around 04/24, roughly 239 days out. Fall's first freeze usually shows up around 10/21, roughly 178 days after the last spring frost.
The USDA Plant Hardiness Zone Map puts Ossian 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
With roughly 8 weeks until Ossian's first fall frost, a row cover or cold frame is what stretches the last few weeks of harvest here.
Why 04/24 isn't a guarantee
04/24 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 04/10 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 05/10 and only about 1 year in 10 sees frost after that.
Ossian against the rest of the dataset
At roughly 178 frost-free days, Ossian places 25,716 of 40,283 ZIP codes in this dataset. Within IN, it ranks 590 of 927.
Learn more
Before leaning on 46777's figures: zone vs. frost date explains why Zone 6a and Ossian's frost date answer different questions, while the frost range explains how to read the range around Ossian's dates instead of trusting one.