Frost dates in St. Ignace, MI
The average last spring frost in St. Ignace is around May 12 and the first fall frost is around October 23. That gives St. Ignace an average growing season of about 164 days.
Last spring frost
| Early (10% chance after) | May 1 |
|---|---|
| Average (50%) | May 12 |
| Late (90%) | May 19 |
First fall frost
| Early (10%) | October 13 |
|---|---|
| Average (50%) | October 23 |
| Late (90% chance before) | November 1 |