New Haven, IN 46899 Frost Dates
When can you plant in New Haven, IN?
Typically, the last spring freeze lands around 04/24, roughly 239 days out. The first fall frost typically arrives around 10/21, about 178 frost-free days later.
New Haven 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.
What to do before the first frost
About 8 weeks of growing season left in New Haven before the first fall frost — a cold frame or row cover can stretch harvest weeks past that date.
How much risk comes with planting early here
04/24 is the middle of 30 years of NOAA records, not a promise. Plant by 04/10 and you're betting against frost in roughly 9 years out of 10. 05/10 is the safer bet, historically only a 1-in-10 chance of frost that late.
How New Haven compares
New Haven's growing season runs about 178 days, ranking 25,621 of 40,283 US ZIP codes measured here, longest to shortest. Within IN, it ranks 580 of 927.
Learn more
the frost range covers how to read the range around New Haven's dates instead of trusting one. local microclimates covers what one yard in New Haven can differ from the 46899 normal.