Frost dates in Sugar Grove, IL
The average last spring frost in Sugar Grove is around May 4 and the first fall frost is around October 11. That gives Sugar Grove an average growing season of about 160 days.
Last spring frost
| Early (10% chance after) | April 21 |
|---|---|
| Average (50%) | May 4 |
| Late (90%) | May 22 |
First fall frost
| Early (10%) | September 30 |
|---|---|
| Average (50%) | October 11 |
| Late (90% chance before) | October 22 |