Frost dates in Shelbyville, IL
The average last spring frost in Shelbyville is around April 12 and the first fall frost is around October 19. That gives Shelbyville an average growing season of about 190 days.
Last spring frost
| Early (10% chance after) | March 27 |
|---|---|
| Average (50%) | April 12 |
| Late (90%) | April 21 |
First fall frost
| Early (10%) | October 5 |
|---|---|
| Average (50%) | October 19 |
| Late (90% chance before) | November 8 |