Frost dates in Sprague, WA
The average last spring frost in Sprague is around June 11 and the first fall frost is around September 12. That gives Sprague an average growing season of about 93 days.
Last spring frost
| Early (10% chance after) | May 15 |
|---|---|
| Average (50%) | June 11 |
| Late (90%) | July 8 |
First fall frost
| Early (10%) | August 23 |
|---|---|
| Average (50%) | September 12 |
| Late (90% chance before) | October 6 |