Frost dates in Roslyn, SD
The average last spring frost in Roslyn is around May 8 and the first fall frost is around October 3. That gives Roslyn an average growing season of about 148 days.
Last spring frost
| Early (10% chance after) | April 22 |
|---|---|
| Average (50%) | May 8 |
| Late (90%) | May 19 |
First fall frost
| Early (10%) | September 21 |
|---|---|
| Average (50%) | October 3 |
| Late (90% chance before) | October 23 |