Fergus CountyPower Outage History
What this grade means
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 |
|---|---|---|---|
| Apr 11, 2020 | 7 hrs | 4,252 (55%) | Unnamed event |
| Oct 26, 2022 | 2 hrs | 4,101 (53%) | Heavy Snow |
| Jun 25, 2025 | 3 hrs | 2,802 (36%) | Unnamed event |
| Aug 5, 2024 | 2 hrs | 2,801 (36%) | Unnamed event |
| May 7, 2020 | 14 hrs | 1,796 (23%) | Unnamed event |
Was There an Outage on a Specific Date?
Pick a date to see whether a power outage was recorded for Fergus County, Montana that day.
Over the 6 years from 2020 to 2025, Fergus County recorded 91 distinct power outage events, averaging 3.8 hours per event.
The single worst outage on record in Fergus County started April 11, 2020, lasting 7 hours and leaving up to 4,252 customers without power (55% of the county) at its peak.
January has historically been the worst month for outages in Fergus County, with 10 events recorded during that month across the dataset.
Based on this history, Fergus County earns a Reliability Grade of A, placing it in the 82nd percentile nationally for grid reliability (higher percentile = more reliable).
Similar counties in Montana
Counties with the closest reliability grade and national percentile to Fergus County.
| County | Grade | National percentile |
|---|---|---|
| Richland County | A | 83rd |
| Broadwater County | A | 81st |
| Daniels County | A | 81st |
| Deer Lodge County | A | 83rd |
| Lake County | A | 80th |
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 Fergus County?
Between 2020 and 2025, Fergus County recorded 91 outage events, averaging 3.8 hours each.
What is Fergus County's reliability grade?
Fergus County has a Reliability Grade of A, in the 82nd national percentile.
What was the worst power outage in Fergus County?
The worst outage on record started April 11, 2020, lasting 7 hours and affecting up to 4,252 customers.