Sumter County Power Outage History
2014–2025 · Florida
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 11, 2017 | 187 hrs | 40,040 (39%) | Hurricane Irma |
| Oct 9, 2024 | 164 hrs | 39,085 (38%) | Hurricane Milton |
| Aug 2, 2022 | 5 hrs | 18,029 (18%) | Unnamed event |
| Apr 16, 2025 | 2 hrs | 16,575 (16%) | Unnamed event |
| Aug 5, 2024 | 19 hrs | 14,502 (14%) | Hurricane Debby |
Over the 12 years from 2014 to 2025, Sumter County recorded 753 distinct power outage events, averaging 1.9 hours per event.
The single worst outage on record in Sumter County started September 11, 2017 (Hurricane Irma), lasting 187 hours and leaving up to 40,040 customers without power (39% of the county) at its peak.
August has historically been the worst month for outages in Sumter County, with 104 events recorded during that month across the dataset.
Based on this history, Sumter County earns a Reliability Grade of C, placing it in the 47th percentile nationally for grid reliability (higher percentile = more reliable).
Sized for Sumter County's outage profile
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Similar counties in Florida
Counties with the closest reliability grade and national percentile to Sumter County.
| County | Grade | National percentile |
|---|---|---|
| Duval County | C | 47th |
| Palm Beach County | C | 44th |
| Alachua County | C | 44th |
| Santa Rosa County | C | 42nd |
| Broward County | C | 41st |
FAQ
How often does power go out in Sumter County?
Between 2014 and 2025, Sumter County recorded 753 outage events, averaging 1.9 hours each.
What is Sumter County's reliability grade?
Sumter County has a Reliability Grade of C, in the 47th national percentile.
What was the worst power outage in Sumter County?
The worst outage on record started September 11, 2017 (Hurricane Irma), lasting 187 hours and affecting up to 40,040 customers.