Muskegon, MI 49440 Frost Dates
Frost dates for Muskegon, MI, ZIP 49440
Typically, the last spring freeze lands around 04/30, roughly 245 days out. The first fall frost typically arrives around 10/19, about 170 frost-free days later.
The USDA Plant Hardiness Zone Map puts Muskegon 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 Muskegon 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.
The actual range around Muskegon's last frost
04/30 is the middle of 30 years of NOAA records, not a promise. Plant by 04/17 and you're betting against frost in roughly 9 years out of 10. 05/18 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Muskegon compares
At roughly 170 frost-free days, Muskegon places 28,896 of 40,283 ZIP codes in this dataset. Within MI, it ranks 306 of 1,153.
Learn more
zone vs. frost date explains why Zone 6b and Muskegon's frost date answer different questions, and the frost range explains how to read the range around Muskegon's dates instead of trusting one.