Frost dates in Morning Sun, IA
The average last spring frost in Morning Sun is around April 22 and the first fall frost is around October 14. That gives Morning Sun an average growing season of about 175 days.
Last spring frost
| Early (10% chance after) | April 8 |
|---|---|
| Average (50%) | April 22 |
| Late (90%) | May 4 |
First fall frost
| Early (10%) | October 3 |
|---|---|
| Average (50%) | October 14 |
| Late (90% chance before) | October 29 |