Frost dates in Glenrock, WY
The average last spring frost in Glenrock is around May 21 and the first fall frost is around October 3. That gives Glenrock an average growing season of about 135 days.
Last spring frost
| Early (10% chance after) | May 8 |
|---|---|
| Average (50%) | May 21 |
| Late (90%) | May 26 |
First fall frost
| Early (10%) | September 20 |
|---|---|
| Average (50%) | October 3 |
| Late (90% chance before) | October 13 |