Yankton County Power Outage History
2019–2025 · South Dakota
Better than average — fewer or shorter outages than most counties. How grades are calculated
Outages by year
Outages by month (seasonality)
Worst outage events on record
| Date | Duration | Customers affected | Cause |
|---|---|---|---|
| Jul 18, 2023 | 4 hrs | 5,835 (38%) | Drought |
| May 8, 2023 | 3 hrs | 3,237 (21%) | Flood |
| Mar 5, 2022 | 2 hrs | 3,235 (21%) | Winter Weather |
| Aug 16, 2023 | 2 hrs | 2,187 (14%) | Hail |
| Feb 18, 2025 | 4 hrs | 1,953 (13%) | Drought |
Over the 7 years from 2019 to 2025, Yankton County recorded 100 distinct power outage events, averaging 9.8 hours per event.
The single worst outage on record in Yankton County started July 18, 2023 (Drought), lasting 4 hours and leaving up to 5,835 customers without power (38% of the county) at its peak.
July has historically been the worst month for outages in Yankton County, with 20 events recorded during that month across the dataset.
Based on this history, Yankton County earns a Reliability Grade of B, placing it in the 65th percentile nationally for grid reliability (higher percentile = more reliable).
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Similar counties in South Dakota
Counties with the closest reliability grade and national percentile to Yankton County.
| County | Grade | National percentile |
|---|---|---|
| Fall River County | B | 65th |
| Hanson County | B | 65th |
| Lake County | B | 65th |
| Day County | B | 65th |
| Turner County | B | 64th |
FAQ
How often does power go out in Yankton County?
Between 2019 and 2025, Yankton County recorded 100 outage events, averaging 9.8 hours each.
What is Yankton County's reliability grade?
Yankton County has a Reliability Grade of B, in the 65th national percentile.
What was the worst power outage in Yankton County?
The worst outage on record started July 18, 2023 (Drought), lasting 4 hours and affecting up to 5,835 customers.