Roann, IN 46974 Frost Dates
46974, near Roann, IN: the frost window
Around 04/26 is the usual last spring frost, about 241 days away. Fall's first freeze usually shows up around 10/19, roughly 174 days after the last spring frost.
Zone 6a (-10 to -5°F average annual minimum) comes from the USDA Plant Hardiness Zone Map; the frost dates above are the 1991-2020 normal at the nearest reporting NOAA station for Roann, not a forecast for this year.
Stretching the season past the first frost
Roann'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.
Why 04/26 isn't a guarantee
04/26 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 04/12 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 05/11 and only about 1 year in 10 sees frost after that.
Roann against the rest of the dataset
At roughly 174 frost-free days, Roann places 27,599 of 40,283 ZIP codes in this dataset. Within IN, it ranks 685 of 927.
Learn more
Two guides worth reading on 46974: the frost range, on how to read the range around Roann's dates instead of trusting one, and local microclimates, on what one yard in Roann can differ from the 46974 normal.