Montgomery 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 |
|---|---|---|---|
| Sep 27, 2024 | 13 hrs | 62,412 (21%) | Hurricane Helene |
| Sep 28, 2024 | 121 hrs | 58,113 (20%) | Hurricane Helene |
| May 28, 2019 | 65 hrs | 45,385 (15%) | Thunderstorm Wind |
| May 28, 2019 | 9 hrs | 44,355 (15%) | Thunderstorm Wind |
| May 28, 2019 | 2 hrs | 43,050 (15%) | Thunderstorm Wind |
Over the 12 years from 2014 to 2025, Montgomery County recorded 1,707 distinct power outage events, averaging 2.8 hours per event.
The single worst outage on record in Montgomery County started September 27, 2024 (Hurricane Helene), lasting 13 hours and leaving up to 62,412 customers without power (21% of the county) at its peak.
July has historically been the worst month for outages in Montgomery County, with 222 events recorded during that month across the dataset.
Based on this history, Montgomery County earns a Reliability Grade of C, placing it in the 60th 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 Montgomery County.
| County | Grade | National percentile |
|---|---|---|
| Champaign County | C | 59th |
| Lorain County | C | 59th |
| Darke County | B | 61st |
| Allen County | C | 58th |
| Warren County | B | 62nd |
FAQ
How often does power go out in Montgomery County?
Between 2014 and 2025, Montgomery County recorded 1,707 outage events, averaging 2.8 hours each.
What is Montgomery County's reliability grade?
Montgomery County has a Reliability Grade of C, in the 60th national percentile.
What was the worst power outage in Montgomery County?
The worst outage on record started September 27, 2024 (Hurricane Helene), lasting 13 hours and affecting up to 62,412 customers.