Newburgh, IN 42451 Frost Dates
42451, near Newburgh, IN: the frost window
Around 04/03 is the usual last spring frost, about 218 days away. Fall's first freeze usually shows up around 11/02, roughly 214 days after the last spring frost.
The USDA Plant Hardiness Zone Map puts Newburgh in Zone 7a (0 to 5°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
Newburgh'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.
Why 04/03 isn't a guarantee
04/03 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 03/18 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 04/17 and only about 1 year in 10 sees frost after that.
Newburgh against the rest of the dataset
At roughly 214 frost-free days, Newburgh places 14,254 of 40,283 ZIP codes in this dataset. Within IN, it ranks 28 of 927.
Learn more
Two guides worth reading on 42451: the frost range, on how to read the range around Newburgh's dates instead of trusting one, and local microclimates, on what one yard in Newburgh can differ from the 42451 normal.