New Haven, IN 46869 Frost Dates
46869, near New Haven, IN: the frost window
Typically, the last spring freeze lands around 04/24, roughly 239 days out. Fall's first freeze usually shows up around 10/21, roughly 178 days after the last spring frost.
The USDA Plant Hardiness Zone Map puts New Haven in Zone 6a (-10 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
New Haven'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.
Why 04/24 isn't a guarantee
04/24 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 04/10 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 05/10 and only about 1 year in 10 sees frost after that.
New Haven against the rest of the dataset
About 178 days separate New Haven's last and first frost, putting it 25,615 of 40,283 ZIP codes nationally. Within IN, it ranks 574 of 927.
Learn more
Two guides worth reading on 46869: zone vs. frost date, on why Zone 6a and New Haven's frost date answer different questions, and the frost range, on how to read the range around New Haven's dates instead of trusting one.