Knox 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 |
|---|---|---|---|
| Jul 10, 2016 | 12 hrs | 10,484 (35%) | Thunderstorm Wind |
| Sep 24, 2016 | 3 hrs | 8,868 (29%) | Thunderstorm Wind |
| Mar 6, 2022 | 5 hrs | 8,572 (28%) | Thunderstorm Wind |
| Jun 27, 2019 | 8 hrs | 6,846 (23%) | Unnamed event |
| Apr 26, 2024 | 1 hrs | 6,423 (21%) | Unnamed event |
Over the 12 years from 2014 to 2025, Knox County recorded 600 distinct power outage events, averaging 2.9 hours per event.
The single worst outage on record in Knox County started July 10, 2016 (Thunderstorm Wind), lasting 12 hours and leaving up to 10,484 customers without power (35% of the county) at its peak.
July has historically been the worst month for outages in Knox County, with 66 events recorded during that month across the dataset.
Based on this history, Knox County earns a Reliability Grade of C, placing it in the 50th percentile nationally for grid reliability (higher percentile = more reliable).
Sized for Knox 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 Knox County.
| County | Grade | National percentile |
|---|---|---|
| Bureau County | C | 50th |
| Jo Daviess County | C | 50th |
| Logan County | C | 50th |
| Saline County | C | 51st |
| Calhoun County | C | 49th |
FAQ
How often does power go out in Knox County?
Between 2014 and 2025, Knox County recorded 600 outage events, averaging 2.9 hours each.
What is Knox County's reliability grade?
Knox County has a Reliability Grade of C, in the 50th national percentile.
What was the worst power outage in Knox County?
The worst outage on record started July 10, 2016 (Thunderstorm Wind), lasting 12 hours and affecting up to 10,484 customers.