McDonough CountyPower Outage History
What this grade means
Better than average — fewer or shorter outages than most counties. This county's outage history is better than the national median: recorded outages are less frequent and/or shorter in duration than a typical US county experienced over the same 12-year period. It isn't in the top tier nationally, but its track record points to lower-than-average outage risk.
Outages by year
Outages by month (seasonality)
Worst outage events on record
| Date | Duration | Customers affected | Cause |
|---|---|---|---|
| Jun 29, 2023 | 105 hrs | 4,645 (32%) | Thunderstorm Wind |
| Apr 20, 2021 | 1 hrs | 4,126 (28%) | Unnamed event |
| May 8, 2023 | 16 hrs | 2,232 (15%) | Hail |
| Aug 23, 2016 | 1 hrs | 1,841 (13%) | Unnamed event |
| May 16, 2022 | 1 hrs | 1,524 (10%) | Tornado |
Was There an Outage on a Specific Date?
Pick a date to see whether a power outage was recorded for McDonough County, Illinois that day.
Over the 11 years from 2015 to 2025, McDonough County recorded 155 distinct power outage events, averaging 3.5 hours per event.
The single worst outage on record in McDonough County started June 29, 2023 (Thunderstorm Wind), lasting 105 hours and leaving up to 4,645 customers without power (32% of the county) at its peak.
May has historically been the worst month for outages in McDonough County, with 26 events recorded during that month across the dataset.
Based on this history, McDonough County earns a Reliability Grade of B, placing it in the 76th percentile nationally for grid reliability (higher percentile = more reliable).
Similar counties in Illinois
Counties with the closest reliability grade and national percentile to McDonough County.
| County | Grade | National percentile |
|---|---|---|
| Union County | B | 76th |
| Macoupin County | B | 75th |
| Mason County | B | 75th |
| Moultrie County | B | 77th |
| Grundy County | B | 77th |
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 McDonough County?
Between 2015 and 2025, McDonough County recorded 155 outage events, averaging 3.5 hours each.
What is McDonough County's reliability grade?
McDonough County has a Reliability Grade of B, in the 76th national percentile.
What was the worst power outage in McDonough County?
The worst outage on record started June 29, 2023 (Thunderstorm Wind), lasting 105 hours and affecting up to 4,645 customers.