Frost dates in Twin Brooks, SD
The average last spring frost in Twin Brooks is around May 8 and the first fall frost is around September 27. That gives Twin Brooks an average growing season of about 142 days.
Last spring frost
| Early (10% chance after) | April 23 |
|---|---|
| Average (50%) | May 8 |
| Late (90%) | May 26 |
First fall frost
| Early (10%) | September 16 |
|---|---|
| Average (50%) | September 27 |
| Late (90% chance before) | October 14 |