Marquette County Power Outage History
2015–2025 · Wisconsin
Average — typical outage frequency and duration nationally. How grades are calculated
Outages by year
Outages by month (seasonality)
Worst outage events on record
| Date | Duration | Customers affected | Cause |
|---|---|---|---|
| Aug 28, 2018 | 65 hrs | 5,520 (57%) | Tornado |
| Jun 14, 2017 | 20 hrs | 3,847 (40%) | Thunderstorm Wind |
| Jun 15, 2022 | 45 hrs | 2,503 (26%) | Excessive Heat |
| Apr 14, 2018 | 6 hrs | 2,503 (26%) | Winter Storm |
| Jun 23, 2025 | 8 hrs | 2,473 (26%) | Heat |
Over the 11 years from 2015 to 2025, Marquette County recorded 346 distinct power outage events, averaging 2.9 hours per event.
The single worst outage on record in Marquette County started August 28, 2018 (Tornado), lasting 65 hours and leaving up to 5,520 customers without power (57% of the county) at its peak.
July has historically been the worst month for outages in Marquette County, with 57 events recorded during that month across the dataset.
Based on this history, Marquette County earns a Reliability Grade of C, placing it in the 46th percentile nationally for grid reliability (higher percentile = more reliable).
Sized for Marquette County's outage profile
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Similar counties in Wisconsin
Counties with the closest reliability grade and national percentile to Marquette County.
| County | Grade | National percentile |
|---|---|---|
| Jefferson County | C | 46th |
| Sawyer County | C | 44th |
| Walworth County | C | 49th |
| Waupaca County | C | 44th |
| Ozaukee County | C | 50th |
FAQ
How often does power go out in Marquette County?
Between 2015 and 2025, Marquette County recorded 346 outage events, averaging 2.9 hours each.
What is Marquette County's reliability grade?
Marquette County has a Reliability Grade of C, in the 46th national percentile.
What was the worst power outage in Marquette County?
The worst outage on record started August 28, 2018 (Tornado), lasting 65 hours and affecting up to 5,520 customers.