Montgomery CountyPower Outage History
2015–2025 · Iowa
Better than average — fewer or shorter outages than most counties.
Outages by year
Outages by month (seasonality)
Worst outage events on record
| Date | Duration | Customers affected | Cause |
|---|---|---|---|
| Apr 1, 2023 | 3 hrs | 4,524 (79%) | Unnamed event |
| Nov 29, 2022 | 4 hrs | 4,396 (77%) | Unnamed event |
| Dec 1, 2021 | 1 hrs | 4,346 (76%) | Unnamed event |
| Mar 19, 2025 | 1 hrs | 4,108 (72%) | Thunderstorm Wind |
| Nov 29, 2022 | <1 hr | 4,097 (72%) | Unnamed event |
Over the 11 years from 2015 to 2025, Montgomery County recorded 310 distinct power outage events, averaging 2.5 hours per event.
The single worst outage on record in Montgomery County started April 1, 2023, lasting 3 hours and leaving up to 4,524 customers without power (79% of the county) at its peak.
July has historically been the worst month for outages in Montgomery County, with 42 events recorded during that month across the dataset.
Based on this history, Montgomery County earns a Reliability Grade of B, placing it in the 74th percentile nationally for grid reliability (higher percentile = more reliable).
Sized for Montgomery County's outage profile
See more picks in our Best Small Power Stations (Under 1,000Wh) roundup.
Outage-prep kit
See our outage-prep guides.
Similar counties in Iowa
Counties with the closest reliability grade and national percentile to Montgomery County.
| County | Grade | National percentile |
|---|---|---|
| Taylor County | B | 74th |
| Monona County | B | 74th |
| Humboldt County | B | 75th |
| Floyd County | B | 75th |
| Dallas County | B | 76th |
Most reliable counties in Iowa
The top 3 counties in Iowa by reliability grade and percentile.
| County | Grade | National percentile |
|---|---|---|
| Clay County | A | 97th |
| Emmet County | A | 95th |
| Bremer County | A | 94th |
Least reliable counties in Iowa
The bottom 3 counties in Iowa by reliability grade and percentile.
| County | Grade | National percentile |
|---|---|---|
| Marshall County | F | 6th |
| Tama County | F | 12th |
| Jasper County | F | 14th |
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 Montgomery County?
Between 2015 and 2025, Montgomery County recorded 310 outage events, averaging 2.5 hours each.
What is Montgomery County's reliability grade?
Montgomery County has a Reliability Grade of B, in the 74th national percentile.
What was the worst power outage in Montgomery County?
The worst outage on record started April 1, 2023, lasting 3 hours and affecting up to 4,524 customers.