Madison CountyPower Outage History
2020–2025 · Montana
Worse than average — more frequent or longer outages than most counties.
Outages by year
Outages by month (seasonality)
Worst outage events on record
| Date | Duration | Customers affected | Cause |
|---|---|---|---|
| Nov 8, 2020 | 16 hrs | 6,110 (97%) | Unnamed event |
| Sep 10, 2024 | <1 hr | 3,687 (58%) | Wildfire |
| Oct 11, 2021 | 6 hrs | 2,860 (45%) | Unnamed event |
| Sep 16, 2025 | 4 hrs | 1,953 (31%) | Wildfire |
| Jun 28, 2022 | 3 hrs | 1,863 (29%) | Thunderstorm Wind |
Over the 6 years from 2020 to 2025, Madison County recorded 324 distinct power outage events, averaging 3.9 hours per event.
The single worst outage on record in Madison County started November 8, 2020, lasting 16 hours and leaving up to 6,110 customers without power (97% of the county) at its peak.
June has historically been the worst month for outages in Madison County, with 52 events recorded during that month across the dataset.
Based on this history, Madison County earns a Reliability Grade of D, placing it in the 31st percentile nationally for grid reliability (higher percentile = more reliable).
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Similar counties in Montana
Counties with the closest reliability grade and national percentile to Madison County.
| County | Grade | National percentile |
|---|---|---|
| Granite County | D | 33rd |
| Flathead County | D | 35th |
| Chouteau County | D | 37th |
| Meagher County | D | 38th |
| Mineral County | D | 39th |
Most reliable counties in Montana
The top 3 counties in Montana by reliability grade and percentile.
| County | Grade | National percentile |
|---|---|---|
| Powder River County | A | 95th |
| Roosevelt County | A | 94th |
| Fallon County | A | 94th |
Least reliable counties in Montana
The bottom 3 counties in Montana by reliability grade and percentile.
| County | Grade | National percentile |
|---|---|---|
| Lincoln County | F | 14th |
| Sanders County | D | 20th |
| Madison County | D | 31st |
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 Madison County?
Between 2020 and 2025, Madison County recorded 324 outage events, averaging 3.9 hours each.
What is Madison County's reliability grade?
Madison County has a Reliability Grade of D, in the 31st national percentile.
What was the worst power outage in Madison County?
The worst outage on record started November 8, 2020, lasting 16 hours and affecting up to 6,110 customers.