Frost dates in Bonanza, OR
The average last spring frost in Bonanza is around June 20 and the first fall frost is around September 20. That gives Bonanza an average growing season of about 92 days.
Last spring frost
| Early (10% chance after) | June 9 |
|---|---|
| Average (50%) | June 20 |
| Late (90%) | June 30 |
First fall frost
| Early (10%) | September 1 |
|---|---|
| Average (50%) | September 20 |
| Late (90% chance before) | October 26 |