Frost dates in Timber Lake, SD
The average last spring frost in Timber Lake is around May 13 and the first fall frost is around September 25. That gives Timber Lake an average growing season of about 135 days.
Last spring frost
| Early (10% chance after) | April 30 |
|---|---|
| Average (50%) | May 13 |
| Late (90%) | May 27 |
First fall frost
| Early (10%) | September 13 |
|---|---|
| Average (50%) | September 25 |
| Late (90% chance before) | October 12 |