Frost dates in Manchester, NH
The average last spring frost in Manchester is around May 11 and the first fall frost is around September 29. That gives Manchester an average growing season of about 141 days.
Last spring frost
| Early (10% chance after) | April 23 |
|---|---|
| Average (50%) | May 11 |
| Late (90%) | May 31 |
First fall frost
| Early (10%) | September 14 |
|---|---|
| Average (50%) | September 29 |
| Late (90% chance before) | October 20 |