Frost dates in Ashton, IA
The average last spring frost in Ashton is around May 10 and the first fall frost is around September 27. That gives Ashton an average growing season of about 140 days.
Last spring frost
| Early (10% chance after) | April 23 |
|---|---|
| Average (50%) | May 10 |
| Late (90%) | May 27 |
First fall frost
| Early (10%) | September 14 |
|---|---|
| Average (50%) | September 27 |
| Late (90% chance before) | October 12 |