Frost dates in San Luis, CO
The average last spring frost in San Luis is around June 10 and the first fall frost is around September 20. That gives San Luis an average growing season of about 102 days.
Last spring frost
| Early (10% chance after) | May 24 |
|---|---|
| Average (50%) | June 10 |
| Late (90%) | June 26 |
First fall frost
| Early (10%) | August 18 |
|---|---|
| Average (50%) | September 20 |
| Late (90% chance before) | October 3 |