Frost dates in Weiser, ID
The average last spring frost in Weiser is around May 9 and the first fall frost is around September 30. That gives Weiser an average growing season of about 144 days.
Last spring frost
| Early (10% chance after) | April 19 |
|---|---|
| Average (50%) | May 9 |
| Late (90%) | May 31 |
First fall frost
| Early (10%) | September 14 |
|---|---|
| Average (50%) | September 30 |
| Late (90% chance before) | October 19 |