Frost dates in Hamilton, WA
The average last spring frost in Hamilton is around April 14 and the first fall frost is around October 27. That gives Hamilton an average growing season of about 196 days.
Last spring frost
| Early (10% chance after) | March 17 |
|---|---|
| Average (50%) | April 14 |
| Late (90%) | May 10 |
First fall frost
| Early (10%) | October 2 |
|---|---|
| Average (50%) | October 27 |
| Late (90% chance before) | November 20 |