Shelby County Power Outage History
2014–2025 · Illinois
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 |
|---|---|---|---|
| Jun 29, 2023 | 81 hrs | 4,823 (44%) | Drought |
| Jun 13, 2023 | 2 hrs | 4,801 (44%) | Drought |
| Jul 21, 2020 | 6 hrs | 3,135 (28%) | Unnamed event |
| Jul 13, 2016 | 22 hrs | 3,017 (27%) | Thunderstorm Wind |
| Apr 8, 2020 | 5 hrs | 2,687 (24%) | Unnamed event |
Over the 12 years from 2014 to 2025, Shelby County recorded 734 distinct power outage events, averaging 2.6 hours per event.
The single worst outage on record in Shelby County started June 29, 2023 (Drought), lasting 81 hours and leaving up to 4,823 customers without power (44% of the county) at its peak.
June has historically been the worst month for outages in Shelby County, with 100 events recorded during that month across the dataset.
Based on this history, Shelby County earns a Reliability Grade of C, placing it in the 46th percentile nationally for grid reliability (higher percentile = more reliable).
Sized for Shelby County's outage profile
See more picks in our Best Dual-Fuel Portable Generators for Power Outages roundup.
Champion Power Equipment 4375-Watt Dual Fuel RV Ready Portable Generator with Free 3-Year Warranty
Outage-prep kit
See our outage-prep guides.
Similar counties in Illinois
Counties with the closest reliability grade and national percentile to Shelby County.
| County | Grade | National percentile |
|---|---|---|
| Lee County | C | 46th |
| Vermilion County | C | 46th |
| Fayette County | C | 46th |
| Pope County | C | 45th |
| Jefferson County | C | 47th |
FAQ
How often does power go out in Shelby County?
Between 2014 and 2025, Shelby County recorded 734 outage events, averaging 2.6 hours each.
What is Shelby County's reliability grade?
Shelby County has a Reliability Grade of C, in the 46th national percentile.
What was the worst power outage in Shelby County?
The worst outage on record started June 29, 2023 (Drought), lasting 81 hours and affecting up to 4,823 customers.