Frost dates in Blue Mound, IL
The average last spring frost in Blue Mound is around April 18 and the first fall frost is around October 10. That gives Blue Mound an average growing season of about 175 days.
Last spring frost
| Early (10% chance after) | April 6 |
|---|---|
| Average (50%) | April 18 |
| Late (90%) | May 4 |
First fall frost
| Early (10%) | September 24 |
|---|---|
| Average (50%) | October 10 |
| Late (90% chance before) | October 26 |