Whitehall, MI 49461 Frost Dates
Frost dates for Whitehall, MI, ZIP 49461
The last spring frost here typically falls around 05/19, about 264 days from today. The first fall frost typically arrives around 10/04, about 136 frost-free days later.
The USDA Plant Hardiness Zone Map puts Whitehall in Zone 6b (-5 to 0°F average annual minimum); frost dates are NOAA's 1991-2020 station normal, not this year's forecast.
What to do before the first frost
Zone 6b around Whitehall has about 5 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
05/19 is the middle of 30 years of NOAA records, not a promise. Plant by 05/01 and you're betting against frost in roughly 9 years out of 10. 06/06 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Whitehall compares
Whitehall's growing season runs about 136 days, ranking 37,685 of 40,283 US ZIP codes measured here, longest to shortest. Within MI, it ranks 948 of 1,153.
Learn more
the frost range explains how to read the range around Whitehall's dates instead of trusting one, and local microclimates explains what one yard in Whitehall can differ from the 49461 normal.