Frederick County Power Outage History
2014–2025 · Maryland
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 8, 2022 | 0 hrs | 17,733 (13%) | Unnamed event |
| May 31, 2015 | 2 hrs | 9,606 (7%) | Thunderstorm Wind |
| Apr 9, 2016 | 2 hrs | 8,627 (7%) | Frost/Freeze |
| Dec 11, 2014 | 2 hrs | 8,526 (6%) | Winter Weather |
| Jun 18, 2015 | 1 hrs | 8,410 (6%) | Thunderstorm Wind |
Over the 12 years from 2014 to 2025, Frederick County recorded 1,256 distinct power outage events, averaging 2.5 hours per event.
The single worst outage on record in Frederick County started December 8, 2022, lasting 0 hours and leaving up to 17,733 customers without power (13% of the county) at its peak.
June has historically been the worst month for outages in Frederick County, with 146 events recorded during that month across the dataset.
Based on this history, Frederick County earns a Reliability Grade of B, placing it in the 74th percentile nationally for grid reliability (higher percentile = more reliable).
Sized for Frederick County's outage profile
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Outage-prep kit
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Similar counties in Maryland
Counties with the closest reliability grade and national percentile to Frederick County.
| County | Grade | National percentile |
|---|---|---|
| Somerset County | B | 74th |
| Calvert County | B | 76th |
| Washington County | B | 72nd |
| Montgomery County | B | 71st |
| Howard County | B | 78th |
FAQ
How often does power go out in Frederick County?
Between 2014 and 2025, Frederick County recorded 1,256 outage events, averaging 2.5 hours each.
What is Frederick County's reliability grade?
Frederick County has a Reliability Grade of B, in the 74th national percentile.
What was the worst power outage in Frederick County?
The worst outage on record started December 8, 2022, lasting 0 hours and affecting up to 17,733 customers.