Roscommon, MI 48656 Frost Dates
When can you plant in Roscommon, MI?
The last spring frost here typically falls around 05/19, about 264 days from today. The first fall frost typically arrives around 09/23, about 125 frost-free days later.
The USDA Plant Hardiness Zone Map puts Roscommon in Zone 5a (-20 to -15°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
About 4 weeks of growing season left in Roscommon before the first fall frost — a cold frame or row cover can stretch harvest weeks past that date.
How much risk comes with planting early here
05/19 is the middle of 30 years of NOAA records, not a promise. Plant by 04/30 and you're betting against frost in roughly 9 years out of 10. 06/03 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Roscommon compares
Roscommon's growing season runs about 125 days, ranking 38,776 of 40,283 US ZIP codes measured here, longest to shortest. Within MI, it ranks 1,078 of 1,153.
Learn more
the frost range covers how to read the range around Roscommon's dates instead of trusting one. local microclimates covers what one yard in Roscommon can differ from the 48656 normal.