Frost dates in La Harpe, IL
The average last spring frost in La Harpe is around April 23 and the first fall frost is around October 12. That gives La Harpe an average growing season of about 172 days.
Last spring frost
| Early (10% chance after) | April 10 |
|---|---|
| Average (50%) | April 23 |
| Late (90%) | May 9 |
First fall frost
| Early (10%) | September 27 |
|---|---|
| Average (50%) | October 12 |
| Late (90% chance before) | October 28 |