– 0 customers out in Montana
Power outage history
Montana
3.9hours
without power for the average customer in a typical year, 2018–2025. 34th of 51.
Electricity customers 621,474 Across 56 counties
Worst well-recorded year 2024 8.2 hours without power, average customer
County by county
Where Montana goes dark
Hours without power for the average customer in a typical year. Hover a county; click to open it.
Fewer hours64+ h / yr
Year by year
Hours in the dark, statewide
The record
Montana's largest outages
Statewide events with at least 2% of customers, or 25,000, out at once, by peak.
| Began | Storm | Peak out | Share |
|---|---|---|---|
| Dec 17, 2025 | Windstorm | 95,420 | 15.3% |
| Jul 24, 2024 | Heat | 64,485 | 10.4% |
| May 31, 2020 | Thunderstorms | 37,544 | 6.0% |
| Jan 13, 2021 | Windstorm | 34,247 | 5.5% |
| Aug 23, 2024 | Thunderstorms | 33,865 | 5.5% |
Every county
All 56 counties
| County | Hours / yr | Major outages since 2018 | Customers |
|---|---|---|---|
| Meagher | 33 | 95 | 513 |
| Mineral | 25 | 40 | 2,455 |
| Wheatland | 20 | 68 | 705 |
| Liberty | 18 | 39 | 804 |
| Judith Basin | 16 | 57 | 1,006 |
| Chouteau | 15 | 62 | 1,959 |
| Lincoln | 14 | 31 | 12,721 |
| Golden Valley | 13 | 56 | 316 |
| Sanders | 13 | 45 | 7,314 |
| Madison | 12 | 47 | 6,199 |
| Granite | 11 | 37 | 2,293 |
| Teton | 11 | 65 | 2,050 |
| Phillips | 11 | 36 | 1,992 |
| Blaine | 8.9 | 30 | 2,740 |
| Richland | 7.8 | 12 | 9,805 |
| Missoula | 7.7 | 5 | 57,348 |
| Pondera | 7.4 | 24 | 2,031 |
| Valley | 7.3 | 35 | 3,912 |
| Jefferson | 7.1 | 16 | 5,322 |
| Sweet Grass | 7.1 | 42 | 1,993 |
| Flathead | 6.9 | 17 | 65,575 |
| Powell | 6.7 | 17 | 4,506 |
| Musselshell | 5.6 | 18 | 2,362 |
| Park | 5.3 | 18 | 8,763 |
| Cascade | 5.1 | 7 | 39,166 |
| Hill | 5.0 | 28 | 7,876 |
| Carbon | 4.9 | 25 | 6,512 |
| Lewis and Clark | 4.4 | 14 | 32,887 |
| Fergus | 4.1 | 16 | 5,384 |
| Deer Lodge | 4.0 | 20 | 6,663 |
| Ravalli | 3.9 | 6 | 25,043 |
| Beaverhead | 3.7 | 25 | 3,612 |
| Rosebud | 3.1 | 28 | 4,647 |
| Broadwater | 3.0 | 9 | 3,290 |
| Lake | 2.6 | 9 | 24,041 |
| Yellowstone | 2.4 | 1 | 77,606 |
| Silver Bow | 2.3 | 5 | 24,074 |
| Stillwater | 2.0 | 10 | 5,383 |
| Gallatin | 1.9 | 4 | 96,603 |
| Big Horn | 0.9 | 2 | 6,865 |
| Custer | 0.6 | 11 | 6,942 |
| Carter | – | 0 | 508 |
| Daniels | – | 18 | 429 |
| Dawson | – | 8 | 7,435 |
| Fallon | – | 8 | 2,280 |
| Garfield | – | 0 | 598 |
| Glacier | – | 0 | 12,671 |
| McCone | – | 0 | 882 |
| Petroleum | – | 0 | 265 |
| Powder River | – | 2 | 583 |
| Prairie | – | 31 | 758 |
| Roosevelt | – | 4 | 7,252 |
| Sheridan | – | 16 | 1,766 |
| Toole | – | 0 | 3,546 |
| Treasure | – | 0 | 548 |
| Wibaux | – | 15 | 675 |
Who keeps the lights on
Utilities in Montana
Reliability and residential price as reported to the EIA for the latest year. Outage minutes include major storm days.
| Utility | Type | Outage min / yr | Excl. major storms | ¢/kWh | Customers |
|---|---|---|---|---|---|
| NorthWestern Energy LLC | Investor Owned | 125 | 117 | 14.4 | 334k |
| Flathead Electric Coop Inc | Cooperative | 886 | 174 | 10.0 | 64k |
| Yellowstone Valley Elec Co-op | Cooperative | – | – | 14.2 | 21k |
| Montana-Dakota Utilities Co | Investor Owned | 146 | 146 | 12.3 | 20k |
| USBIA-Mission Valley Power | Federal | – | – | 9.4 | 16k |
| Missoula Electric Coop, Inc | Cooperative | 1,332 | 363 | 10.9 | 15k |
| Fergus Electric Coop, Inc | Cooperative | 480 | 284 | 15.9 | 6.9k |
| Northern Lights, Inc | Cooperative | 223 | 88 | 13.1 | 4.7k |
| Lower Yellowstone R E A, Inc | Cooperative | 259 | 157 | 9.2 | 3.2k |
| Fall River Rural Elec Coop Inc | Cooperative | 14 | 14 | 11.1 | 1.5k |