⚡ US Energy Price Monitorby KadoaUpdated weeklyStar on GitHub

South Dakota

NorthWestern Energy electricity rates

What homes pay NorthWestern Energy for electricity, from EIA.

Investor-owned utility, 52,039 homes in South Dakota. EIA lists it as NorthWestern Energy - (SD).

Headlines

Average price
14.1¢ a kWh
Up 9.8% on a year ago
Average bill
$129 a month
Up 6.6% on a year ago
Average use
913 kWh
A month. South Dakota 986 kWh
Price rank in South Dakota
5 of 8
1 is the most expensive

Over the 12 months to July 2026, NorthWestern Energy homes paid 14.1¢ a kWh, against 14.2¢ across South Dakota.

NorthWestern Energy vs South Dakota

NorthWestern EnergySouth Dakota
Average price, 12 months to July 202614.1¢14.2¢
Price in July 202614.8¢15.4¢
Average monthly bill, 12 months$129$140
Bill in July 2026$137$176
Average monthly use913 kWh986 kWh
Price change, past year+9.8%+7.6%
Price change since 2019+33%+23%

Electricity price

Average residential price a kilowatt-hour, by month.

Up to and including July 2026

Source: EIA-861M monthly utility survey. Revenue over kilowatt-hours sold, including fixed charges.

Average monthly bill

What an average home pays a month.

Up to and including July 2026

Source: EIA-861M monthly utility survey.