Hours Of Operations NorthWestern Energy Montana Missoula NorthWestern Energy Hours of Operation and Locations in Missoula, MT 4.8 - 111 votes 1 Locations in Missoula www.northwesternenergy.com NorthWestern Energy Hours Category: Home & Garden NorthWestern Energy - Missoula, MT 59808 (888) 467-2669 View Store Details Explore MissoulaView More Apparel CostcoTJ MaxxRoss Dress for LessH & MCarhartt Sports CostcoTargetSports AuthorityVansColeman Jewelry CostcoZalesKay JewelersChico'sAvon Recommend For You NSTAR Orlando Utilities Commission Otter Tail Power Company Peoples Gas Pepco Runnings Farm & Fleet Tucson Electric Power United Power Urgent Care of Connecticut Aero Energy