Frost dates in Stonington, IL
The average last spring frost in Stonington is around April 20 and the first fall frost is around October 24. That gives Stonington an average growing season of about 187 days.
Last spring frost
| Early (10% chance after) | March 28 |
|---|---|
| Average (50%) | April 20 |
| Late (90%) | April 23 |
First fall frost
| Early (10%) | October 7 |
|---|---|
| Average (50%) | October 24 |
| Late (90% chance before) | November 10 |