Frost dates in Frederick, CO
The average last spring frost in Frederick is around May 6 and the first fall frost is around September 28. That gives Frederick an average growing season of about 145 days.
Last spring frost
| Early (10% chance after) | April 22 |
|---|---|
| Average (50%) | May 6 |
| Late (90%) | May 22 |
First fall frost
| Early (10%) | September 14 |
|---|---|
| Average (50%) | September 28 |
| Late (90% chance before) | October 14 |