Dupont, IN 47227 Frost Dates
Dupont, IN: when does the frost end?
Typically, the last spring freeze lands around 04/21, roughly 236 days out. Fall's first freeze usually shows up around 10/21, roughly 180 days after the last spring frost.
The USDA Plant Hardiness Zone Map puts Dupont 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
With roughly 8 weeks until Dupont's first fall frost, a row cover or cold frame is what stretches the last few weeks of harvest here.
Why 04/21 isn't a guarantee
04/21 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 04/06 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.
Dupont against the rest of the dataset
At roughly 180 frost-free days, Dupont places 25,042 of 40,283 ZIP codes in this dataset. Within IN, it ranks 511 of 927.
Learn more
Before leaning on 47227's figures: local microclimates explains what one yard in Dupont can differ from the 47227 normal, while zone vs. frost date explains why Zone 6b and Dupont's frost date answer different questions.