Day 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 |
|---|---|---|---|
| Apr 7, 2022 | 3 hrs | 2,407 (30%) | High Wind |
| Dec 14, 2022 | 17 hrs | 2,317 (29%) | Ice Storm |
| Feb 27, 2021 | 6 hrs | 2,014 (25%) | Unnamed event |
| Dec 13, 2022 | 9 hrs | 1,821 (23%) | Ice Storm |
| Nov 25, 2025 | 4 hrs | 1,447 (18%) | Blizzard |
Over the 7 years from 2019 to 2025, Day County recorded 270 distinct power outage events, averaging 4.8 hours per event.
The single worst outage on record in Day County started April 7, 2022 (High Wind), lasting 3 hours and leaving up to 2,407 customers without power (30% of the county) at its peak.
October has historically been the worst month for outages in Day County, with 40 events recorded during that month across the dataset.
Based on this history, Day County earns a Reliability Grade of B, placing it in the 65th percentile nationally for grid reliability (higher percentile = more reliable).
Sized for Day County's outage profile
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Outage-prep kit
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Similar counties in South Dakota
Counties with the closest reliability grade and national percentile to Day County.
| County | Grade | National percentile |
|---|---|---|
| Lake County | B | 65th |
| Hanson County | B | 65th |
| Fall River County | B | 65th |
| Yankton County | B | 65th |
| Turner County | B | 64th |
FAQ
How often does power go out in Day County?
Between 2019 and 2025, Day County recorded 270 outage events, averaging 4.8 hours each.
What is Day County's reliability grade?
Day County has a Reliability Grade of B, in the 65th national percentile.
What was the worst power outage in Day County?
The worst outage on record started April 7, 2022 (High Wind), lasting 3 hours and affecting up to 2,407 customers.