Marathon County Power Outage History
2014–2025 · Wisconsin
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 |
|---|---|---|---|
| Dec 14, 2022 | 58 hrs | 12,628 (16%) | Winter Storm |
| Jul 29, 2021 | 43 hrs | 11,577 (14%) | Thunderstorm Wind |
| May 25, 2021 | 11 hrs | 11,541 (14%) | Thunderstorm Wind |
| Jun 15, 2022 | 37 hrs | 11,532 (14%) | Thunderstorm Wind |
| Jun 19, 2020 | 2 hrs | 11,369 (14%) | Unnamed event |
Over the 12 years from 2014 to 2025, Marathon County recorded 511 distinct power outage events, averaging 2.8 hours per event.
The single worst outage on record in Marathon County started December 14, 2022 (Winter Storm), lasting 58 hours and leaving up to 12,628 customers without power (16% of the county) at its peak.
July has historically been the worst month for outages in Marathon County, with 68 events recorded during that month across the dataset.
Based on this history, Marathon County earns a Reliability Grade of B, placing it in the 66th percentile nationally for grid reliability (higher percentile = more reliable).
Sized for Marathon County's outage profile
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Outage-prep kit
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Similar counties in Wisconsin
Counties with the closest reliability grade and national percentile to Marathon County.
| County | Grade | National percentile |
|---|---|---|
| Washburn County | B | 65th |
| Milwaukee County | B | 66th |
| Racine County | B | 64th |
| Ashland County | B | 68th |
| Rusk County | B | 68th |
FAQ
How often does power go out in Marathon County?
Between 2014 and 2025, Marathon County recorded 511 outage events, averaging 2.8 hours each.
What is Marathon County's reliability grade?
Marathon County has a Reliability Grade of B, in the 66th national percentile.
What was the worst power outage in Marathon County?
The worst outage on record started December 14, 2022 (Winter Storm), lasting 58 hours and affecting up to 12,628 customers.