Sault Ste. Marie, MI 49784 Frost Dates
49784, near Sault Ste. Marie, MI: the frost window
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
Sault Ste. Marie's growing season runs out in roughly 6 weeks — a cold frame or greenhouse kit is the usual way to keep cool-weather crops going past the first frost.
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
About 151 days separate Sault Ste. Marie's last and first frost, putting it 34,965 of 40,283 ZIP codes nationally. Within MI, it ranks 812 of 1,153.
Learn more
Two guides worth reading on 49784: the frost range, on how to read the range around Sault Ste. Marie's dates instead of trusting one, and local microclimates, on what one yard in Sault Ste. Marie can differ from the 49784 normal.