New Haven, IN 46851 Frost Dates
When can you plant in New Haven, IN?
The last spring frost here typically falls around 04/24, about 239 days from today. The first fall frost typically arrives around 10/21, about 178 frost-free days later.
Zone 6a (-10 to -5°F average annual minimum) comes from the USDA Plant Hardiness Zone Map; the frost dates above are the 1991-2020 normal at the nearest reporting NOAA station for New Haven, not a forecast for this year.
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.
The actual range around New Haven's last frost
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
At roughly 178 frost-free days, New Haven places 25,598 of 40,283 ZIP codes in this dataset. Within IN, it ranks 557 of 927.
Learn more
local microclimates covers what one yard in New Haven can differ from the 46851 normal. zone vs. frost date covers why Zone 6a and New Haven's frost date answer different questions.