Frost dates in Simla, CO
The average last spring frost in Simla is around May 15 and the first fall frost is around October 5. That gives Simla an average growing season of about 143 days.
Last spring frost
| Early (10% chance after) | April 30 |
|---|---|
| Average (50%) | May 15 |
| Late (90%) | May 29 |
First fall frost
| Early (10%) | September 19 |
|---|---|
| Average (50%) | October 5 |
| Late (90% chance before) | October 13 |