Frost dates in Arthur, IA
The average last spring frost in Arthur is around May 4 and the first fall frost is around October 3. That gives Arthur an average growing season of about 152 days.
Last spring frost
| Early (10% chance after) | April 16 |
|---|---|
| Average (50%) | May 4 |
| Late (90%) | May 18 |
First fall frost
| Early (10%) | September 21 |
|---|---|
| Average (50%) | October 3 |
| Late (90% chance before) | October 25 |