Sault Ste. Marie, MI 49752 Frost Dates
When can you plant in Sault Ste. Marie, MI?
Around 06/01 is the usual last spring frost, about 277 days away. The first fall frost typically arrives around 09/21, about 110 frost-free days later.
The USDA Plant Hardiness Zone Map puts Sault Ste. Marie in Zone 4b (-25 to -20°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 3 weeks of growing season left in Sault Ste. Marie before the first fall frost — a cold frame or row cover can stretch harvest weeks past that date.
The actual range around Sault Ste. Marie's last frost
06/01 is the middle of 30 years of NOAA records, not a promise. Plant by 05/18 and you're betting against frost in roughly 9 years out of 10. 06/20 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Sault Ste. Marie compares
At roughly 110 frost-free days, Sault Ste. Marie places 39,498 of 40,283 ZIP codes in this dataset. Within MI, it ranks 1,128 of 1,153.
Learn more
the frost range covers how to read the range around Sault Ste. Marie's dates instead of trusting one. local microclimates covers what one yard in Sault Ste. Marie can differ from the 49752 normal.