Frost dates in Hillrose, CO
The average last spring frost in Hillrose is around May 14 and the first fall frost is around October 7. That gives Hillrose an average growing season of about 146 days.
Last spring frost
| Early (10% chance after) | April 27 |
|---|---|
| Average (50%) | May 14 |
| Late (90%) | May 24 |
First fall frost
| Early (10%) | September 27 |
|---|---|
| Average (50%) | October 7 |
| Late (90% chance before) | October 12 |