Frost dates in Onaway, ID
The average last spring frost in Onaway is around May 31 and the first fall frost is around September 8. That gives Onaway an average growing season of about 100 days.
Last spring frost
| Early (10% chance after) | May 4 |
|---|---|
| Average (50%) | May 31 |
| Late (90%) | July 3 |
First fall frost
| Early (10%) | August 20 |
|---|---|
| Average (50%) | September 8 |
| Late (90% chance before) | October 2 |