Clinton County Power Outage History
2014–2025 · Iowa
Worse than average — more frequent or longer outages than most counties. How grades are calculated
Outages by year
Outages by month (seasonality)
Worst outage events on record
| Date | Duration | Customers affected | Cause |
|---|---|---|---|
| Aug 10, 2020 | 210 hrs | 21,264 (78%) | Thunderstorm Wind |
| Jun 30, 2019 | 21 hrs | 6,484 (24%) | Thunderstorm Wind |
| Jul 14, 2024 | 1 hrs | 4,603 (17%) | Flood |
| Mar 31, 2023 | 20 hrs | 4,585 (17%) | Winter Storm |
| Jul 8, 2018 | 1 hrs | 4,540 (17%) | Unnamed event |
Over the 12 years from 2014 to 2025, Clinton County recorded 503 distinct power outage events, averaging 2.2 hours per event.
The single worst outage on record in Clinton County started August 10, 2020 (Thunderstorm Wind), lasting 210 hours and leaving up to 21,264 customers without power (78% of the county) at its peak.
July has historically been the worst month for outages in Clinton County, with 63 events recorded during that month across the dataset.
Based on this history, Clinton County earns a Reliability Grade of D, placing it in the 23rd percentile nationally for grid reliability (higher percentile = more reliable).
Sized for Clinton County's outage profile
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Similar counties in Iowa
Counties with the closest reliability grade and national percentile to Clinton County.
| County | Grade | National percentile |
|---|---|---|
| Cedar County | D | 22nd |
| Monroe County | D | 21st |
| Greene County | D | 20th |
| Iowa County | D | 27th |
| Benton County | F | 18th |
FAQ
How often does power go out in Clinton County?
Between 2014 and 2025, Clinton County recorded 503 outage events, averaging 2.2 hours each.
What is Clinton County's reliability grade?
Clinton County has a Reliability Grade of D, in the 23rd national percentile.
What was the worst power outage in Clinton County?
The worst outage on record started August 10, 2020 (Thunderstorm Wind), lasting 210 hours and affecting up to 21,264 customers.