Benton Harbor, MI 49022 Frost Dates
Frost dates for Benton Harbor, MI, ZIP 49022
The last spring frost here typically falls around 05/05, about 250 days from today. The first fall frost typically arrives around 10/15, about 161 frost-free days later.
Benton Harbor sits in USDA Zone 6b (-5 to 0°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 6b around Benton Harbor has about 7 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.
How much risk comes with planting early here
05/05 is the middle of 30 years of NOAA records, not a promise. Plant by 04/20 and you're betting against frost in roughly 9 years out of 10. 05/26 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Benton Harbor compares
About 161 days separate Benton Harbor's last and first frost, putting it 32,004 of 40,283 ZIP codes nationally. Within MI, it ranks 560 of 1,153.
Learn more
the frost range explains how to read the range around Benton Harbor's dates instead of trusting one, and local microclimates explains what one yard in Benton Harbor can differ from the 49022 normal.