Montgomery 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 |
|---|---|---|---|
| May 28, 2025 | <1 hr | 83,206 (69%) | Unnamed event |
| Mar 3, 2023 | 88 hrs | 48,425 (40%) | High Wind |
| Oct 26, 2019 | 16 hrs | 36,834 (31%) | Tropical Storm Olga |
| Jun 17, 2022 | 28 hrs | 18,943 (16%) | Thunderstorm Wind |
| May 26, 2024 | 32 hrs | 18,123 (15%) | Thunderstorm Wind |
Was There an Outage on a Specific Date?
Pick a date to see whether a power outage was recorded for Montgomery County, Tennessee that day.
Over the 11 years from 2015 to 2025, Montgomery County recorded 1,034 distinct power outage events, averaging 1.9 hours per event.
The single worst outage on record in Montgomery County started May 28, 2025, lasting less than 1 hour and leaving up to 83,206 customers without power (69% of the county) at its peak.
July has historically been the worst month for outages in Montgomery County, with 136 events recorded during that month across the dataset.
Based on this history, Montgomery County earns a Reliability Grade of B, placing it in the 65th percentile nationally for grid reliability (higher percentile = more reliable).
Similar counties in Tennessee
Counties with the closest reliability grade and national percentile to Montgomery County.
| County | Grade | National percentile |
|---|---|---|
| Madison County | B | 65th |
| Campbell County | B | 64th |
| Cocke County | B | 63rd |
| Claiborne County | B | 63rd |
| Obion County | B | 62nd |
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 Montgomery County?
Between 2015 and 2025, Montgomery County recorded 1,034 outage events, averaging 1.9 hours each.
What is Montgomery County's reliability grade?
Montgomery County has a Reliability Grade of B, in the 65th national percentile.
What was the worst power outage in Montgomery County?
The worst outage on record started May 28, 2025, lasting less than 1 hour and affecting up to 83,206 customers.