Frost dates in Mark, IL
The average last spring frost in Mark is around May 3 and the first fall frost is around October 8. That gives Mark an average growing season of about 158 days.
Last spring frost
| Early (10% chance after) | April 16 |
|---|---|
| Average (50%) | May 3 |
| Late (90%) | May 18 |
First fall frost
| Early (10%) | September 23 |
|---|---|
| Average (50%) | October 8 |
| Late (90% chance before) | October 25 |