New Haven, IN 46885 Frost Dates
New Haven, IN: when does the frost end?
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
With roughly 8 weeks until New Haven's first fall frost, a row cover or cold frame is what stretches the last few weeks of harvest here.
How much risk comes with planting early here
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 25,616 of 40,283 ZIP codes nationally. Within IN, it ranks 575 of 927.
Learn more
Before leaning on 46885's figures: local microclimates explains what one yard in New Haven can differ from the 46885 normal, while zone vs. frost date explains why Zone 6a and New Haven's frost date answer different questions.