Sault Ste. Marie, MI 49786 Frost Dates
Sault Ste. Marie, MI: when does the frost end?
The last spring frost here typically falls around 05/09, about 254 days from today. Fall's first freeze usually shows up around 10/11, roughly 151 days after the last spring frost.
Sault Ste. Marie sits in USDA Zone 5a (-20 to -15°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.
Stretching the season past the first frost
With roughly 6 weeks until Sault Ste. Marie's first fall frost, a row cover or cold frame is what stretches the last few weeks of harvest here.
The actual range around Sault Ste. Marie's last frost
05/09 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 04/27 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 05/27 and only about 1 year in 10 sees frost after that.
Sault Ste. Marie against the rest of the dataset
Sault Ste. Marie's growing season runs about 151 days, ranking 34,966 of 40,283 US ZIP codes measured here, longest to shortest. Within MI, it ranks 813 of 1,153.
Learn more
Before leaning on 49786's figures: the frost range explains how to read the range around Sault Ste. Marie's dates instead of trusting one, while local microclimates explains what one yard in Sault Ste. Marie can differ from the 49786 normal.