Frost dates in Mapleton, IL
The average last spring frost in Mapleton is around April 19 and the first fall frost is around October 18. That gives Mapleton an average growing season of about 182 days.
Last spring frost
| Early (10% chance after) | April 6 |
|---|---|
| Average (50%) | April 19 |
| Late (90%) | May 4 |
First fall frost
| Early (10%) | October 4 |
|---|---|
| Average (50%) | October 18 |
| Late (90% chance before) | November 2 |