Frost dates in Alamosa, CO
The average last spring frost in Alamosa is around May 31 and the first fall frost is around September 20. That gives Alamosa an average growing season of about 112 days.
Last spring frost
| Early (10% chance after) | May 16 |
|---|---|
| Average (50%) | May 31 |
| Late (90%) | June 15 |
First fall frost
| Early (10%) | September 5 |
|---|---|
| Average (50%) | September 20 |
| Late (90% chance before) | October 1 |