Coles County Power Outage History
2014–2025 · Illinois
Top 20% most reliable nationally — infrequent, short outages. How grades are calculated
Outages by year
Outages by month (seasonality)
Worst outage events on record
| Date | Duration | Customers affected | Cause |
|---|---|---|---|
| Jun 29, 2023 | 78 hrs | 9,390 (29%) | Drought |
| Jul 13, 2016 | 12 hrs | 8,551 (26%) | Thunderstorm Wind |
| Sep 8, 2015 | 3 hrs | 8,078 (25%) | Thunderstorm Wind |
| Feb 24, 2016 | 15 hrs | 6,112 (19%) | Blizzard |
| Mar 30, 2025 | 6 hrs | 5,432 (17%) | Unnamed event |
Over the 12 years from 2014 to 2025, Coles County recorded 291 distinct power outage events, averaging 2.1 hours per event.
The single worst outage on record in Coles County started June 29, 2023 (Drought), lasting 78 hours and leaving up to 9,390 customers without power (29% of the county) at its peak.
June has historically been the worst month for outages in Coles County, with 38 events recorded during that month across the dataset.
Based on this history, Coles County earns a Reliability Grade of A, placing it in the 84th percentile nationally for grid reliability (higher percentile = more reliable).
Sized for Coles County's outage profile
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Similar counties in Illinois
Counties with the closest reliability grade and national percentile to Coles County.
| County | Grade | National percentile |
|---|---|---|
| Jersey County | A | 84th |
| Menard County | A | 82nd |
| Richland County | A | 87th |
| Wayne County | A | 88th |
| White County | A | 88th |
FAQ
How often does power go out in Coles County?
Between 2014 and 2025, Coles County recorded 291 outage events, averaging 2.1 hours each.
What is Coles County's reliability grade?
Coles County has a Reliability Grade of A, in the 84th national percentile.
What was the worst power outage in Coles County?
The worst outage on record started June 29, 2023 (Drought), lasting 78 hours and affecting up to 9,390 customers.