Frost dates in Tolono, IL
The average last spring frost in Tolono is around April 21 and the first fall frost is around October 12. That gives Tolono an average growing season of about 174 days.
Last spring frost
| Early (10% chance after) | April 9 |
|---|---|
| Average (50%) | April 21 |
| Late (90%) | May 20 |
First fall frost
| Early (10%) | September 16 |
|---|---|
| Average (50%) | October 12 |
| Late (90% chance before) | October 30 |