Frost dates in Portsmouth, VA
The average last spring frost in Portsmouth is around March 17 and the first fall frost is around November 29. That gives Portsmouth an average growing season of about 257 days.
Last spring frost
| Early (10% chance after) | February 23 |
|---|---|
| Average (50%) | March 17 |
| Late (90%) | March 30 |
First fall frost
| Early (10%) | November 13 |
|---|---|
| Average (50%) | November 29 |
| Late (90% chance before) | December 13 |