Jones CountyPower Outage History
What this grade means
Average — typical outage frequency and duration nationally. This county sits in the middle of the national distribution — its outage frequency and duration over the past 12 years are close to the nationwide median, neither notably better nor worse than most other US counties. A typical amount of backup-power preparedness is reasonable here.
Outages by year
Outages by month (seasonality)
Worst outage events on record
| Date | Duration | Customers affected | Cause |
|---|---|---|---|
| Aug 10, 2020 | 187 hrs | 5,250 (49%) | Thunderstorm Wind |
| Jul 11, 2025 | 30 hrs | 3,762 (35%) | Tornado |
| May 14, 2018 | 1 hrs | 3,163 (29%) | Hail |
| Jul 6, 2016 | 4 hrs | 3,120 (29%) | Thunderstorm Wind |
| Dec 16, 2021 | 7 hrs | 3,110 (29%) | High Wind |
Was There an Outage on a Specific Date?
Pick a date to see whether a power outage was recorded for Jones County, Iowa that day.
Over the 12 years from 2014 to 2025, Jones County recorded 308 distinct power outage events, averaging 3.0 hours per event.
The single worst outage on record in Jones County started August 10, 2020 (Thunderstorm Wind), lasting 187 hours and leaving up to 5,250 customers without power (49% of the county) at its peak.
July has historically been the worst month for outages in Jones County, with 44 events recorded during that month across the dataset.
Based on this history, Jones County earns a Reliability Grade of C, placing it in the 45th percentile nationally for grid reliability (higher percentile = more reliable).
Similar counties in Iowa
Counties with the closest reliability grade and national percentile to Jones County.
| County | Grade | National percentile |
|---|---|---|
| Grundy County | C | 46th |
| Louisa County | C | 44th |
| Calhoun County | C | 47th |
| Adams County | C | 43rd |
| Washington County | C | 47th |
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 Jones County?
Between 2014 and 2025, Jones County recorded 308 outage events, averaging 3.0 hours each.
What is Jones County's reliability grade?
Jones County has a Reliability Grade of C, in the 45th national percentile.
What was the worst power outage in Jones County?
The worst outage on record started August 10, 2020 (Thunderstorm Wind), lasting 187 hours and affecting up to 5,250 customers.