Frost dates in Eureka, SD
The average last spring frost in Eureka is around May 15 and the first fall frost is around September 22. That gives Eureka an average growing season of about 130 days.
Last spring frost
| Early (10% chance after) | April 26 |
|---|---|
| Average (50%) | May 15 |
| Late (90%) | May 28 |
First fall frost
| Early (10%) | September 9 |
|---|---|
| Average (50%) | September 22 |
| Late (90% chance before) | October 8 |