Frost dates in Kennewick, WA
The average last spring frost in Kennewick is around April 13 and the first fall frost is around October 19. That gives Kennewick an average growing season of about 189 days.
Last spring frost
| Early (10% chance after) | March 20 |
|---|---|
| Average (50%) | April 13 |
| Late (90%) | May 2 |
First fall frost
| Early (10%) | September 29 |
|---|---|
| Average (50%) | October 19 |
| Late (90% chance before) | November 8 |