massoutage

2025 Montana Power Outage Report

In 2025, the average Montana customer went without power for about 6.8 hours — the 13th worst of any US state that year, 1.8× the state's decade average. Figures from DOE/ORNL EAGLE-I.

Avg hrs / customer
6.8
Peak customers out
23,250
Rank (worst state)
13th
Counties affected
20

Montana outages over the decade

Average hours without power per customer, 2025 highlighted.

2.3h20151.8h20162.7h20171.9h20180.6h20195.6h20205.0h20213.5h20221.8h20238.5h20246.8h2025

Hardest-hit Montana counties in 2025

By peak customers out during the year's worst event.

1Flathead County23,2502Park County15,3923Gallatin County13,9804Lewis and Clark County12,3095Ravalli County8,9216Missoula County8,4007Lincoln County7,6028Yellowstone County7,0839Hill County7,01210Sanders County6,90311Silver Bow County6,35512Jefferson County6,02213Mineral County5,76314Lake County5,32315Pondera County4,35516Blaine County4,33017Cascade County3,63318Valley County3,21419Phillips County3,20920Fergus County2,802

Biggest Montana outages of 2025

CountyBeganPeak customers out
Flathead CountyDecember 17, 202523,250
Park CountyDecember 17, 202515,392
Gallatin CountyNovember 24, 202513,980
Lewis and Clark CountyJune 3, 202512,309
Lewis and Clark CountyDecember 17, 20259,800
Flathead CountyFebruary 15, 20259,650
Ravalli CountyDecember 17, 20258,921
Missoula CountyDecember 10, 20258,400
Gallatin CountySeptember 24, 20258,289
Lincoln CountyJune 23, 20257,602
Montana by year:20242023202220212020201920182017
Other states in 2025:WVMIAKPANCMO

Part of the 2025 US Power Outage Report. Source: DOE/ORNL EAGLE-I. “Avg hours per customer” is a SAIDI-like measure (outage customer-minutes ÷ tracked customers); coverage varies by year.