Jasper, IN 47549 Frost Dates
47549, near Jasper, 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 11/01, roughly 204 days after the last spring frost.
Zone 6b (-5 to 0°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 Jasper, not a forecast for this year.
Stretching the season past the first frost
Jasper's growing season runs out in roughly 9 weeks — a cold frame or greenhouse kit is the usual way to keep cool-weather crops going past the first frost.
The actual range around Jasper's last frost
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 04/26 and only about 1 year in 10 sees frost after that.
Jasper against the rest of the dataset
Jasper's growing season runs about 204 days, ranking 16,532 of 40,283 US ZIP codes measured here, longest to shortest. Within IN, it ranks 70 of 927.
Learn more
Two guides worth reading on 47549: zone vs. frost date, on why Zone 6b and Jasper's frost date answer different questions, and the frost range, on how to read the range around Jasper's dates instead of trusting one.