Marathon CountyPower Outage History
What this grade means
Better than average — fewer or shorter outages than most counties. This county's outage history is better than the national median: recorded outages are less frequent and/or shorter in duration than a typical US county experienced over the same 12-year period. It isn't in the top tier nationally, but its track record points to lower-than-average outage risk.
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 |
Was There an Outage on a Specific Date?
Pick a date to see whether a power outage was recorded for Marathon County, Wisconsin that day.
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).
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 |
Most reliable counties nationally
The top 3 counties nationally by reliability grade and percentile.
| County | State | Grade | National percentile |
|---|---|---|---|
| Clay County | South Dakota | A | 100th |
| Clearwater County | Minnesota | A | 99th |
| Limestone County | Alabama | A | 99th |
Least reliable counties nationally
The bottom 3 counties nationally by reliability grade and percentile.
| County | State | Grade | National percentile |
|---|---|---|---|
| Clay County | West Virginia | F | 0th |
| Lincoln County | West Virginia | F | 0th |
| Cameron Parish | Louisiana | F | 0th |
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.