Dane 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 22, 2024 | 24 hrs | 46,973 (15%) | Hail |
| Jun 13, 2022 | 69 hrs | 18,824 (6%) | Hail |
| Jul 6, 2016 | 14 hrs | 16,821 (6%) | Thunderstorm Wind |
| Jul 29, 2023 | 25 hrs | 16,785 (5%) | Thunderstorm Wind |
| Jul 20, 2017 | 16 hrs | 15,944 (5%) | Thunderstorm Wind |
Over the 12 years from 2014 to 2025, Dane County recorded 974 distinct power outage events, averaging 2.0 hours per event.
The single worst outage on record in Dane County started May 22, 2024 (Hail), lasting 24 hours and leaving up to 46,973 customers without power (15% of the county) at its peak.
July has historically been the worst month for outages in Dane County, with 133 events recorded during that month across the dataset.
Based on this history, Dane County earns a Reliability Grade of A, placing it in the 92nd percentile nationally for grid reliability (higher percentile = more reliable).
Sized for Dane County's outage profile
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Similar counties in Wisconsin
Counties with the closest reliability grade and national percentile to Dane County.
| County | Grade | National percentile |
|---|---|---|
| Crawford County | A | 92nd |
| Douglas County | A | 91st |
| Price County | A | 92nd |
| Richland County | A | 91st |
| Columbia County | A | 90th |
FAQ
How often does power go out in Dane County?
Between 2014 and 2025, Dane County recorded 974 outage events, averaging 2.0 hours each.
What is Dane County's reliability grade?
Dane County has a Reliability Grade of A, in the 92nd national percentile.
What was the worst power outage in Dane County?
The worst outage on record started May 22, 2024 (Hail), lasting 24 hours and affecting up to 46,973 customers.