Frost dates in Donnellson, IL
The average last spring frost in Donnellson is around April 16 and the first fall frost is around October 18. That gives Donnellson an average growing season of about 185 days.
Last spring frost
| Early (10% chance after) | April 3 |
|---|---|
| Average (50%) | April 16 |
| Late (90%) | May 2 |
First fall frost
| Early (10%) | October 4 |
|---|---|
| Average (50%) | October 18 |
| Late (90% chance before) | November 1 |