Cannon County Power Outage History
2015–2025 · Tennessee
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 |
|---|---|---|---|
| Jun 5, 2015 | 3 hrs | 6,615 (83%) | Unnamed event |
| Aug 21, 2018 | 0 hrs | 4,291 (54%) | Unnamed event |
| Apr 1, 2023 | 0 hrs | 4,118 (52%) | Tornado |
| Oct 8, 2020 | 1 hrs | 2,797 (35%) | Unnamed event |
| Mar 29, 2020 | 15 hrs | 2,735 (34%) | Thunderstorm Wind |
Over the 11 years from 2015 to 2025, Cannon County recorded 374 distinct power outage events, averaging 1.6 hours per event.
The single worst outage on record in Cannon County started June 5, 2015, lasting 3 hours and leaving up to 6,615 customers without power (83% of the county) at its peak.
July has historically been the worst month for outages in Cannon County, with 41 events recorded during that month across the dataset.
Based on this history, Cannon County earns a Reliability Grade of B, placing it in the 78th percentile nationally for grid reliability (higher percentile = more reliable).
Sized for Cannon County's outage profile
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Outage-prep kit
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Similar counties in Tennessee
Counties with the closest reliability grade and national percentile to Cannon County.
| County | Grade | National percentile |
|---|---|---|
| McMinn County | B | 78th |
| Franklin County | B | 78th |
| Marshall County | B | 77th |
| Marion County | B | 77th |
| Wilson County | B | 79th |
FAQ
How often does power go out in Cannon County?
Between 2015 and 2025, Cannon County recorded 374 outage events, averaging 1.6 hours each.
What is Cannon County's reliability grade?
Cannon County has a Reliability Grade of B, in the 78th national percentile.
What was the worst power outage in Cannon County?
The worst outage on record started June 5, 2015, lasting 3 hours and affecting up to 6,615 customers.