Frost dates in Lacon, IL
The average last spring frost in Lacon is around April 22 and the first fall frost is around October 11. That gives Lacon an average growing season of about 172 days.
Last spring frost
| Early (10% chance after) | April 8 |
|---|---|
| Average (50%) | April 22 |
| Late (90%) | May 10 |
First fall frost
| Early (10%) | October 1 |
|---|---|
| Average (50%) | October 11 |
| Late (90% chance before) | October 31 |