Fort Wayne, IN 46809 Frost Dates
Frost dates for Fort Wayne, IN, ZIP 46809
Around 04/24 is the usual last spring frost, about 239 days away. The first fall frost typically arrives around 10/21, about 178 frost-free days later.
Fort Wayne 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
Zone 6a around Fort Wayne has about 8 weeks left before the first fall frost — that's the usual window to get a cold frame up if you want to keep harvesting past it.
Why 04/24 isn't a guarantee
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 Fort Wayne compares
Fort Wayne's growing season runs about 178 days, ranking 25,549 of 40,283 US ZIP codes measured here, longest to shortest. Within IN, it ranks 549 of 927.
Learn more
zone vs. frost date explains why Zone 6a and Fort Wayne's frost date answer different questions, and the frost range explains how to read the range around Fort Wayne's dates instead of trusting one.