Frost dates in La Porte City, IA
The average last spring frost in La Porte City is around April 29 and the first fall frost is around October 5. That gives La Porte City an average growing season of about 159 days.
Last spring frost
| Early (10% chance after) | April 16 |
|---|---|
| Average (50%) | April 29 |
| Late (90%) | May 12 |
First fall frost
| Early (10%) | September 22 |
|---|---|
| Average (50%) | October 5 |
| Late (90% chance before) | October 21 |