Frost dates in Sault Ste. Marie, MI
The average last spring frost in Sault Ste. Marie is around May 20 and the first fall frost is around October 2. That gives Sault Ste. Marie an average growing season of about 135 days.
Last spring frost
| Early (10% chance after) | May 6 |
|---|---|
| Average (50%) | May 20 |
| Late (90%) | June 7 |
First fall frost
| Early (10%) | September 14 |
|---|---|
| Average (50%) | October 2 |
| Late (90% chance before) | October 18 |