Frost dates in Mullan, ID
The average last spring frost in Mullan is around May 28 and the first fall frost is around September 17. That gives Mullan an average growing season of about 112 days.
Last spring frost
| Early (10% chance after) | April 30 |
|---|---|
| Average (50%) | May 28 |
| Late (90%) | June 26 |
First fall frost
| Early (10%) | September 4 |
|---|---|
| Average (50%) | September 17 |
| Late (90% chance before) | October 11 |