Frost dates in St. Maries, ID
The average last spring frost in St. Maries is around May 13 and the first fall frost is around September 21. That gives St. Maries an average growing season of about 131 days.
Last spring frost
| Early (10% chance after) | April 27 |
|---|---|
| Average (50%) | May 13 |
| Late (90%) | June 1 |
First fall frost
| Early (10%) | September 3 |
|---|---|
| Average (50%) | September 21 |
| Late (90% chance before) | October 13 |