Frost dates in Patterson, IA
The average last spring frost in Patterson is around April 28 and the first fall frost is around October 6. That gives Patterson an average growing season of about 161 days.
Last spring frost
| Early (10% chance after) | April 15 |
|---|---|
| Average (50%) | April 28 |
| Late (90%) | May 14 |
First fall frost
| Early (10%) | September 22 |
|---|---|
| Average (50%) | October 6 |
| Late (90% chance before) | October 24 |