Montgomery, IN 47558 Frost Dates
47558, near Montgomery, IN: the frost window
The last spring frost here typically falls around 04/10, about 225 days from today. Fall's first freeze usually shows up around 10/25, roughly 197 days after the last spring frost.
The USDA Plant Hardiness Zone Map puts Montgomery 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
Montgomery's growing season runs out in roughly 8 weeks — a cold frame or greenhouse kit is the usual way to keep cool-weather crops going past the first frost.
How much risk comes with planting early here
04/10 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 03/27 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 04/27 and only about 1 year in 10 sees frost after that.
Montgomery against the rest of the dataset
At roughly 197 frost-free days, Montgomery places 18,739 of 40,283 ZIP codes in this dataset. Within IN, it ranks 140 of 927.
Learn more
Two guides worth reading on 47558: zone vs. frost date, on why Zone 6b and Montgomery's frost date answer different questions, and the frost range, on how to read the range around Montgomery's dates instead of trusting one.