Frost dates in South Prairie, WA
The average last spring frost in South Prairie is around April 20 and the first fall frost is around October 23. That gives South Prairie an average growing season of about 186 days.
Last spring frost
| Early (10% chance after) | March 27 |
|---|---|
| Average (50%) | April 20 |
| Late (90%) | May 8 |
First fall frost
| Early (10%) | October 7 |
|---|---|
| Average (50%) | October 23 |
| Late (90% chance before) | November 12 |