Frost dates in Blue River, CO
The average last spring frost in Blue River is around July 20 and the first fall frost is around August 6. That gives Blue River an average growing season of about 17 days.
Last spring frost
| Early (10% chance after) | June 7 |
|---|---|
| Average (50%) | July 20 |
| Late (90%) | July 31 |
First fall frost
| Early (10%) | August 1 |
|---|---|
| Average (50%) | August 6 |
| Late (90% chance before) | August 28 |