Frost dates in Hartford, CT
The average last spring frost in Hartford is around April 20 and the first fall frost is around October 17. That gives Hartford an average growing season of about 180 days.
Last spring frost
| Early (10% chance after) | April 7 |
|---|---|
| Average (50%) | April 20 |
| Late (90%) | May 10 |
First fall frost
| Early (10%) | September 29 |
|---|---|
| Average (50%) | October 17 |
| Late (90% chance before) | November 2 |