Frost dates in Grand Lake, CO
The average last spring frost in Grand Lake is around July 8 and the first fall frost is around August 16. That gives Grand Lake an average growing season of about 39 days.
Last spring frost
| Early (10% chance after) | June 16 |
|---|---|
| Average (50%) | July 8 |
| Late (90%) | July 30 |
First fall frost
| Early (10%) | August 2 |
|---|---|
| Average (50%) | August 16 |
| Late (90% chance before) | September 7 |