Stillwater CountyPower Outage History
What this grade means
(How grades are calculated)Top 20% most reliable nationally — infrequent, short outages. This county ranks in the most reliable fifth of all US counties in our dataset, based on 12 years of real DOE outage records: outages happen less often here, and when they do occur they tend to be resolved quickly compared to the rest of the country. Baseline outage risk is low, though a severe local storm can still occasionally cause a longer-than-usual outage regardless of the long-term track record.
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 |
Was There an Outage on a Specific Date?
Pick a date to see whether a power outage was recorded for Stillwater County, Montana that day.
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).
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 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.