Stillwater CountyPower Outage History
2020–2025 · Montana
Top 20% most reliable nationally — infrequent, short outages.
Outages by year
Outages by month (seasonality)
Worst outage events on record
| Date | Duration | Customers affected | Cause |
|---|---|---|---|
| Mar 29, 2021 | 2 hrs | 1,338 (24%) | High Wind |
| Aug 28, 2022 | 2 hrs | 1,338 (24%) | Thunderstorm Wind |
| May 13, 2022 | 4 hrs | 1,336 (24%) | High Wind |
| Mar 10, 2022 | 2 hrs | 1,333 (24%) | Winter Storm |
| Feb 29, 2020 | 1 hrs | 1,323 (24%) | High Wind |
Over the 6 years from 2020 to 2025, Stillwater County recorded 73 distinct power outage events, averaging 3.0 hours per event.
The single worst outage on record in Stillwater County started March 29, 2021 (High Wind), lasting 2 hours and leaving up to 1,338 customers without power (24% of the county) at its peak.
July has historically been the worst month for outages in Stillwater County, with 11 events recorded during that month across the dataset.
Based on this history, Stillwater County earns a Reliability Grade of A, placing it in the 90th percentile nationally for grid reliability (higher percentile = more reliable).
Sized for Stillwater County's outage profile
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Outage-prep kit
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Similar counties in Montana
Counties with the closest reliability grade and national percentile to Stillwater County.
| County | Grade | National percentile |
|---|---|---|
| Gallatin County | A | 92nd |
| Silver Bow County | A | 89th |
| Yellowstone County | A | 89th |
| Custer County | A | 87th |
| Dawson County | A | 93rd |
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 Stillwater County?
Between 2020 and 2025, Stillwater County recorded 73 outage events, averaging 3.0 hours each.
What is Stillwater County's reliability grade?
Stillwater County has a Reliability Grade of A, in the 90th national percentile.
What was the worst power outage in Stillwater County?
The worst outage on record started March 29, 2021 (High Wind), lasting 2 hours and affecting up to 1,338 customers.