West Terre Haute, IN 47870 Frost Dates
47870, near West Terre Haute, IN: the frost window
Around 04/15 is the usual last spring frost, about 230 days away. Fall's first freeze usually shows up around 10/19, roughly 187 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 West Terre Haute, not a forecast for this year.
Stretching the season past the first frost
West Terre Haute'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.
How much risk comes with planting early here
04/15 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 03/31 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 05/03 and only about 1 year in 10 sees frost after that.
West Terre Haute against the rest of the dataset
About 187 days separate West Terre Haute's last and first frost, putting it 22,411 of 40,283 ZIP codes nationally. Within IN, it ranks 309 of 927.
Learn more
Two guides worth reading on 47870: the frost range, on how to read the range around West Terre Haute's dates instead of trusting one, and local microclimates, on what one yard in West Terre Haute can differ from the 47870 normal.