Cedar CountyPower Outage History
What this grade means
Worse than average — more frequent or longer outages than most counties. This county's recorded history shows more frequent outages and/or longer restoration times than most US counties over the same 12-year period. If you live here, it's worth taking backup power more seriously than an average household would.
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 |
Was There an Outage on a Specific Date?
Pick a date to see whether a power outage was recorded for Cedar County, Iowa that day.
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).
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 |
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 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.