Dunn County Power Outage History
2014–2025 · Wisconsin
Top 20% most reliable nationally — infrequent, short outages. How grades are calculated
Outages by year
Outages by month (seasonality)
Worst outage events on record
| Date | Duration | Customers affected | Cause |
|---|---|---|---|
| May 11, 2022 | 1 hrs | 6,799 (27%) | Tornado |
| Jul 29, 2025 | 19 hrs | 6,292 (25%) | Thunderstorm Wind |
| Dec 15, 2022 | 30 hrs | 5,164 (21%) | Unnamed event |
| Jan 4, 2023 | 0 hrs | 4,616 (19%) | Winter Weather |
| Jun 10, 2016 | 2 hrs | 3,986 (16%) | Hail |
Over the 12 years from 2014 to 2025, Dunn County recorded 218 distinct power outage events, averaging 2.4 hours per event.
The single worst outage on record in Dunn County started May 11, 2022 (Tornado), lasting 1 hours and leaving up to 6,799 customers without power (27% of the county) at its peak.
June has historically been the worst month for outages in Dunn County, with 39 events recorded during that month across the dataset.
Based on this history, Dunn County earns a Reliability Grade of A, placing it in the 85th percentile nationally for grid reliability (higher percentile = more reliable).
Sized for Dunn County's outage profile
See more picks in our Best Small Power Stations (Under 1,000Wh) roundup.
Outage-prep kit
See our outage-prep guides.
Similar counties in Wisconsin
Counties with the closest reliability grade and national percentile to Dunn County.
| County | Grade | National percentile |
|---|---|---|
| Vernon County | A | 85th |
| Monroe County | A | 86th |
| Trempealeau County | A | 86th |
| La Crosse County | A | 84th |
| Pepin County | A | 83rd |
FAQ
How often does power go out in Dunn County?
Between 2014 and 2025, Dunn County recorded 218 outage events, averaging 2.4 hours each.
What is Dunn County's reliability grade?
Dunn County has a Reliability Grade of A, in the 85th national percentile.
What was the worst power outage in Dunn County?
The worst outage on record started May 11, 2022 (Tornado), lasting 1 hours and affecting up to 6,799 customers.