Perry CountyPower Outage History
What this grade means
Average — typical outage frequency and duration nationally. This county sits in the middle of the national distribution — its outage frequency and duration over the past 12 years are close to the nationwide median, neither notably better nor worse than most other US counties. A typical amount of backup-power preparedness is reasonable here.
Outages by year
Outages by month (seasonality)
Worst outage events on record
| Date | Duration | Customers affected | Cause |
|---|---|---|---|
| Jul 29, 2023 | 47 hrs | 6,266 (52%) | Excessive Heat |
| Mar 15, 2025 | 47 hrs | 5,170 (43%) | Strong Wind |
| Mar 15, 2025 | 3 hrs | 5,095 (43%) | Strong Wind |
| Mar 3, 2023 | 12 hrs | 4,570 (38%) | Strong Wind |
| May 31, 2018 | 37 hrs | 4,349 (36%) | Thunderstorm Wind |
Was There an Outage on a Specific Date?
Pick a date to see whether a power outage was recorded for Perry County, Illinois that day.
Over the 11 years from 2015 to 2025, Perry County recorded 344 distinct power outage events, averaging 3.5 hours per event.
The single worst outage on record in Perry County started July 29, 2023 (Excessive Heat), lasting 47 hours and leaving up to 6,266 customers without power (52% of the county) at its peak.
November has historically been the worst month for outages in Perry County, with 38 events recorded during that month across the dataset.
Based on this history, Perry County earns a Reliability Grade of C, placing it in the 44th percentile nationally for grid reliability (higher percentile = more reliable).
Similar counties in Illinois
Counties with the closest reliability grade and national percentile to Perry County.
| County | Grade | National percentile |
|---|---|---|
| Carroll County | C | 45th |
| Pope County | C | 45th |
| Fayette County | C | 46th |
| Vermilion County | C | 46th |
| Lee County | C | 46th |
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 Perry County?
Between 2015 and 2025, Perry County recorded 344 outage events, averaging 3.5 hours each.
What is Perry County's reliability grade?
Perry County has a Reliability Grade of C, in the 44th national percentile.
What was the worst power outage in Perry County?
The worst outage on record started July 29, 2023 (Excessive Heat), lasting 47 hours and affecting up to 6,266 customers.