Terre Haute, IN 47809 Frost Dates
Terre Haute, IN: when does the frost end?
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.
Terre Haute 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 Terre Haute's first fall frost, a row cover or cold frame is what stretches the last few weeks of harvest here.
Why 04/15 isn't a guarantee
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.
Terre Haute against the rest of the dataset
At roughly 187 frost-free days, Terre Haute places 22,278 of 40,283 ZIP codes in this dataset. Within IN, it ranks 297 of 927.
Learn more
Before leaning on 47809's figures: local microclimates explains what one yard in Terre Haute can differ from the 47809 normal, while zone vs. frost date explains why Zone 6a and Terre Haute's frost date answer different questions.