Ravalli County Power Outage History
2019–2025 · Montana
Better than average — fewer or shorter outages than most counties. How grades are calculated
Outages by year
Outages by month (seasonality)
Worst outage events on record
| Date | Duration | Customers affected | Cause |
|---|---|---|---|
| Aug 23, 2024 | 53 hrs | 9,241 (35%) | Thunderstorm Wind |
| Dec 17, 2025 | 61 hrs | 8,921 (34%) | Strong Wind |
| Sep 7, 2020 | 13 hrs | 5,966 (23%) | Strong Wind |
| Sep 3, 2024 | 3 hrs | 4,480 (17%) | Thunderstorm Wind |
| Mar 2, 2024 | 2 hrs | 2,999 (11%) | Winter Storm |
Over the 7 years from 2019 to 2025, Ravalli County recorded 139 distinct power outage events, averaging 4.0 hours per event.
The single worst outage on record in Ravalli County started August 23, 2024 (Thunderstorm Wind), lasting 53 hours and leaving up to 9,241 customers without power (35% of the county) at its peak.
August has historically been the worst month for outages in Ravalli County, with 21 events recorded during that month across the dataset.
Based on this history, Ravalli County earns a Reliability Grade of B, placing it in the 72nd percentile nationally for grid reliability (higher percentile = more reliable).
Sized for Ravalli County's outage profile
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Similar counties in Montana
Counties with the closest reliability grade and national percentile to Ravalli County.
| County | Grade | National percentile |
|---|---|---|
| Hill County | B | 72nd |
| Prairie County | B | 71st |
| Lewis and Clark County | B | 73rd |
| Cascade County | B | 69th |
| Wibaux County | B | 69th |
FAQ
How often does power go out in Ravalli County?
Between 2019 and 2025, Ravalli County recorded 139 outage events, averaging 4.0 hours each.
What is Ravalli County's reliability grade?
Ravalli County has a Reliability Grade of B, in the 72nd national percentile.
What was the worst power outage in Ravalli County?
The worst outage on record started August 23, 2024 (Thunderstorm Wind), lasting 53 hours and affecting up to 9,241 customers.