Fergus County Power Outage History
2020–2025 · Montana
Top 20% most reliable nationally — infrequent, short outages. How grades are calculated
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 |
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).
Sized for Fergus County's outage profile
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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 |
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.