Frost dates in Caldwell, ID
The average last spring frost in Caldwell is around May 5 and the first fall frost is around October 11. That gives Caldwell an average growing season of about 159 days.
Last spring frost
| Early (10% chance after) | April 17 |
|---|---|
| Average (50%) | May 5 |
| Late (90%) | May 19 |
First fall frost
| Early (10%) | September 23 |
|---|---|
| Average (50%) | October 11 |
| Late (90% chance before) | October 27 |