Frost dates in Granby, CO
The average last spring frost in Granby is around June 22 and the first fall frost is around September 2. That gives Granby an average growing season of about 72 days.
Last spring frost
| Early (10% chance after) | June 2 |
|---|---|
| Average (50%) | June 22 |
| Late (90%) | July 7 |
First fall frost
| Early (10%) | August 12 |
|---|---|
| Average (50%) | September 2 |
| Late (90% chance before) | September 17 |