Frost dates in La Grande, OR
The average last spring frost in La Grande is around May 13 and the first fall frost is around October 2. That gives La Grande an average growing season of about 142 days.
Last spring frost
| Early (10% chance after) | April 24 |
|---|---|
| Average (50%) | May 13 |
| Late (90%) | May 30 |
First fall frost
| Early (10%) | September 15 |
|---|---|
| Average (50%) | October 2 |
| Late (90% chance before) | October 17 |