Cedar County Power Outage History
2015–2025 · 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 | 211 hrs | 6,196 (57%) | Thunderstorm Wind |
| May 21, 2024 | 25 hrs | 4,146 (38%) | Hail |
| Mar 31, 2023 | 26 hrs | 3,739 (35%) | Winter Storm |
| Feb 12, 2019 | 23 hrs | 2,252 (21%) | Winter Weather |
| Oct 6, 2018 | 3 hrs | 1,967 (18%) | Flash Flood |
Over the 11 years from 2015 to 2025, Cedar County recorded 405 distinct power outage events, averaging 2.5 hours per event.
The single worst outage on record in Cedar County started August 10, 2020 (Thunderstorm Wind), lasting 211 hours and leaving up to 6,196 customers without power (57% of the county) at its peak.
June has historically been the worst month for outages in Cedar County, with 49 events recorded during that month across the dataset.
Based on this history, Cedar County earns a Reliability Grade of D, placing it in the 22nd percentile nationally for grid reliability (higher percentile = more reliable).
Sized for Cedar 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 Iowa
Counties with the closest reliability grade and national percentile to Cedar County.
| County | Grade | National percentile |
|---|---|---|
| Clinton County | D | 23rd |
| Monroe County | D | 21st |
| Greene County | D | 20th |
| Benton County | F | 18th |
| Iowa County | D | 27th |
FAQ
How often does power go out in Cedar County?
Between 2015 and 2025, Cedar County recorded 405 outage events, averaging 2.5 hours each.
What is Cedar County's reliability grade?
Cedar County has a Reliability Grade of D, in the 22nd national percentile.
What was the worst power outage in Cedar County?
The worst outage on record started August 10, 2020 (Thunderstorm Wind), lasting 211 hours and affecting up to 6,196 customers.