Summit County Power Outage History
2014–2025 · Ohio
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 |
|---|---|---|---|
| May 17, 2025 | 54 hrs | 46,278 (17%) | Thunderstorm Wind |
| Nov 15, 2020 | 21 hrs | 42,222 (16%) | Thunderstorm Wind |
| Aug 25, 2023 | 82 hrs | 30,171 (11%) | Thunderstorm Wind |
| Apr 8, 2020 | 70 hrs | 29,569 (11%) | Thunderstorm Wind |
| Nov 5, 2017 | 59 hrs | 28,576 (11%) | Thunderstorm Wind |
Over the 12 years from 2014 to 2025, Summit County recorded 2,249 distinct power outage events, averaging 2.4 hours per event.
The single worst outage on record in Summit County started May 17, 2025 (Thunderstorm Wind), lasting 54 hours and leaving up to 46,278 customers without power (17% of the county) at its peak.
June has historically been the worst month for outages in Summit County, with 307 events recorded during that month across the dataset.
Based on this history, Summit County earns a Reliability Grade of C, placing it in the 55th percentile nationally for grid reliability (higher percentile = more reliable).
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Similar counties in Ohio
Counties with the closest reliability grade and national percentile to Summit County.
| County | Grade | National percentile |
|---|---|---|
| Hamilton County | C | 55th |
| Van Wert County | C | 56th |
| Delaware County | C | 56th |
| Muskingum County | C | 54th |
| Pickaway County | C | 57th |
FAQ
How often does power go out in Summit County?
Between 2014 and 2025, Summit County recorded 2,249 outage events, averaging 2.4 hours each.
What is Summit County's reliability grade?
Summit County has a Reliability Grade of C, in the 55th national percentile.
What was the worst power outage in Summit County?
The worst outage on record started May 17, 2025 (Thunderstorm Wind), lasting 54 hours and affecting up to 46,278 customers.