Frost dates in Preston, ID
The average last spring frost in Preston is around May 18 and the first fall frost is around September 25. That gives Preston an average growing season of about 130 days.
Last spring frost
| Early (10% chance after) | April 30 |
|---|---|
| Average (50%) | May 18 |
| Late (90%) | June 15 |
First fall frost
| Early (10%) | September 9 |
|---|---|
| Average (50%) | September 25 |
| Late (90% chance before) | October 11 |