Frost dates in Collbran, CO
The average last spring frost in Collbran is around May 24 and the first fall frost is around September 25. That gives Collbran an average growing season of about 124 days.
Last spring frost
| Early (10% chance after) | May 3 |
|---|---|
| Average (50%) | May 24 |
| Late (90%) | June 1 |
First fall frost
| Early (10%) | September 11 |
|---|---|
| Average (50%) | September 25 |
| Late (90% chance before) | October 11 |