Frost dates in Watertown Town, MA
The average last spring frost in Watertown Town is around April 23 and the first fall frost is around October 20. That gives Watertown Town an average growing season of about 180 days.
Last spring frost
| Early (10% chance after) | April 11 |
|---|---|
| Average (50%) | April 23 |
| Late (90%) | May 9 |
First fall frost
| Early (10%) | October 7 |
|---|---|
| Average (50%) | October 20 |
| Late (90% chance before) | November 5 |