Frost dates in Winchester, ID
The average last spring frost in Winchester is around June 8 and the first fall frost is around September 11. That gives Winchester an average growing season of about 95 days.
Last spring frost
| Early (10% chance after) | May 19 |
|---|---|
| Average (50%) | June 8 |
| Late (90%) | July 15 |
First fall frost
| Early (10%) | August 20 |
|---|---|
| Average (50%) | September 11 |
| Late (90% chance before) | October 6 |