Frost dates in Black Hawk, CO
The average last spring frost in Black Hawk is around June 8 and the first fall frost is around September 16. That gives Black Hawk an average growing season of about 100 days.
Last spring frost
| Early (10% chance after) | May 29 |
|---|---|
| Average (50%) | June 8 |
| Late (90%) | June 23 |
First fall frost
| Early (10%) | September 3 |
|---|---|
| Average (50%) | September 16 |
| Late (90% chance before) | September 23 |