Musselshell CountyPower Outage History
2020–2025 · Montana
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 |
|---|---|---|---|
| Nov 14, 2024 | 5 hrs | 2,012 (84%) | Unnamed event |
| Nov 30, 2025 | 6 hrs | 574 (24%) | Unnamed event |
| Sep 5, 2025 | 5 hrs | 541 (22%) | Unnamed event |
| Aug 19, 2025 | 3 hrs | 541 (22%) | Unnamed event |
| Jul 29, 2025 | 4 hrs | 528 (22%) | Hail |
Over the 6 years from 2020 to 2025, Musselshell County recorded 144 distinct power outage events, averaging 4.2 hours per event.
The single worst outage on record in Musselshell County started November 14, 2024, lasting 5 hours and leaving up to 2,012 customers without power (84% of the county) at its peak.
June has historically been the worst month for outages in Musselshell County, with 21 events recorded during that month across the dataset.
Based on this history, Musselshell County earns a Reliability Grade of B, placing it in the 61st percentile nationally for grid reliability (higher percentile = more reliable).
Sized for Musselshell County's outage profile
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Read our mission →Similar counties in Montana
Counties with the closest reliability grade and national percentile to Musselshell County.
| County | Grade | National percentile |
|---|---|---|
| Carbon County | B | 61st |
| Blaine County | B | 64th |
| Golden Valley County | C | 58th |
| Park County | B | 66th |
| Powell County | C | 55th |
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 Musselshell County?
Between 2020 and 2025, Musselshell County recorded 144 outage events, averaging 4.2 hours each.
What is Musselshell County's reliability grade?
Musselshell County has a Reliability Grade of B, in the 61st national percentile.
What was the worst power outage in Musselshell County?
The worst outage on record started November 14, 2024, lasting 5 hours and affecting up to 2,012 customers.