Frost dates in Prineville, OR
The average last spring frost in Prineville is around June 25 and the first fall frost is around September 1. That gives Prineville an average growing season of about 68 days.
Last spring frost
| Early (10% chance after) | May 26 |
|---|---|
| Average (50%) | June 25 |
| Late (90%) | July 23 |
First fall frost
| Early (10%) | August 7 |
|---|---|
| Average (50%) | September 1 |
| Late (90% chance before) | September 26 |