Frost dates in Preston, IA
The average last spring frost in Preston is around April 30 and the first fall frost is around October 4. That gives Preston an average growing season of about 157 days.
Last spring frost
| Early (10% chance after) | April 12 |
|---|---|
| Average (50%) | April 30 |
| Late (90%) | May 18 |
First fall frost
| Early (10%) | September 20 |
|---|---|
| Average (50%) | October 4 |
| Late (90% chance before) | October 18 |