Greencastle, IN 46135 Frost Dates
Greencastle, IN: when does the frost end?
Typically, the last spring freeze lands around 04/27, roughly 242 days out. Fall's first freeze usually shows up around 10/15, roughly 169 days after the last spring frost.
Greencastle sits in USDA Zone 6a (-10 to -5°F average annual minimum). The dates above are NOAA's 1991-2020 normal at the nearest reporting station, a 30-year average, not a forecast.
Stretching the season past the first frost
With roughly 7 weeks until Greencastle's first fall frost, a row cover or cold frame is what stretches the last few weeks of harvest here.
Why 04/27 isn't a guarantee
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 05/15 and only about 1 year in 10 sees frost after that.
Greencastle against the rest of the dataset
About 169 days separate Greencastle's last and first frost, putting it 29,386 of 40,283 ZIP codes nationally. Within IN, it ranks 811 of 927.
Learn more
Before leaning on 46135's figures: the frost range explains how to read the range around Greencastle's dates instead of trusting one, while local microclimates explains what one yard in Greencastle can differ from the 46135 normal.