Montgomery CountyPower Outage History
What this grade means
(How grades are calculated)Better than average — fewer or shorter outages than most counties. This county's outage history is better than the national median: recorded outages are less frequent and/or shorter in duration than a typical US county experienced over the same 12-year period. It isn't in the top tier nationally, but its track record points to lower-than-average outage risk.
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 |
Was There an Outage on a Specific Date?
Pick a date to see whether a power outage was recorded for Montgomery County, Iowa that day.
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).
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 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.