Frost dates in Hartford, SD
The average last spring frost in Hartford is around April 26 and the first fall frost is around October 10. That gives Hartford an average growing season of about 167 days.
Last spring frost
| Early (10% chance after) | April 20 |
|---|---|
| Average (50%) | April 26 |
| Late (90%) | May 13 |
First fall frost
| Early (10%) | September 27 |
|---|---|
| Average (50%) | October 10 |
| Late (90% chance before) | October 23 |