Allegan, MI 49010 Frost Dates
When can you plant in Allegan, MI?
The last spring frost here typically falls around 05/04, about 249 days from today. The first fall frost typically arrives around 10/15, about 160 frost-free days later.
Allegan 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
About 7 weeks of growing season left in Allegan before the first fall frost — a cold frame or row cover can stretch harvest weeks past that date.
The actual range around Allegan's last frost
05/04 is the middle of 30 years of NOAA records, not a promise. Plant by 04/22 and you're betting against frost in roughly 9 years out of 10. 05/22 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Allegan compares
Allegan's growing season runs about 160 days, ranking 32,299 of 40,283 US ZIP codes measured here, longest to shortest. Within MI, it ranks 624 of 1,153.
Learn more
zone vs. frost date covers why Zone 6a and Allegan's frost date answer different questions. the frost range covers how to read the range around Allegan's dates instead of trusting one.