Frost dates in Hayden, CO
The average last spring frost in Hayden is around June 5 and the first fall frost is around September 12. That gives Hayden an average growing season of about 99 days.
Last spring frost
| Early (10% chance after) | May 19 |
|---|---|
| Average (50%) | June 5 |
| Late (90%) | June 27 |
First fall frost
| Early (10%) | August 28 |
|---|---|
| Average (50%) | September 12 |
| Late (90% chance before) | September 29 |