Frost dates in Nisland, SD
The average last spring frost in Nisland is around May 13 and the first fall frost is around September 26. That gives Nisland an average growing season of about 136 days.
Last spring frost
| Early (10% chance after) | May 1 |
|---|---|
| Average (50%) | May 13 |
| Late (90%) | May 26 |
First fall frost
| Early (10%) | September 12 |
|---|---|
| Average (50%) | September 26 |
| Late (90% chance before) | October 13 |