NorthWestern Energy LLC (MT) electricity rates in Wyoming, 2025
NorthWestern Energy LLC (MT)’s 299 residential customers paid an average of 12.39¢ per kWh in 2025, 7% below the Wyoming average of 13.37¢. The typical home used 796 kWh a month, for an average bill of $99.
- 12.39¢avg ¢/kWh (2025)−0.44¢ (-3.4%) vs 2024
- $99Avg monthly billWyoming: $112
- 796 kWhAvg monthly useWyoming: 835 kWh
- 299Residential customersFull-service utility
| Sector | Customers | Sales (MWh) | Revenue | ¢/kWh 2025 | ¢/kWh 2024 | Change |
|---|---|---|---|---|---|---|
| Residential | 299 | 2,857 | $354,000 | 12.39¢ | 12.83¢ | −0.44¢ (-3.4%) |
| Commercial | 393 | 27,972 | $5,593,000 | 19.99¢ | 19.53¢ | +0.47¢ (+2.4%) |
| Industrial | 0 | 0 | $0 | n/a | n/a | n/a |
| All sectors | 692 | 30,829 | $5,947,000 | 19.29¢ | 18.97¢ | +0.32¢ (+1.7%) |
How NorthWestern Energy LLC (MT) compares
- Wyoming residential average, 2025: 13.37¢ per kWh, 835 kWh a month, $112 average bill. U.S. average: 17.23¢, 874 kWh, $151.
- Latest monthly figure: Wyoming homes paid 14.43¢ per kWh in August 2026 (preliminary), against 14.33¢ in August 2025. Summer months often run higher than the annual average.
- From 2024 to 2025 this average fell 3.4%; the state average rose 7.2%.
- NorthWestern Energy LLC (MT) is an investor-owned utility, a private company whose rates are set by the state utility commission. Balancing authority: NWMT.
Where NorthWestern Energy LLC (MT) serves
EIA lists 2 Wyoming counties in its 2025 service territory: Park, Teton.
13 ZIP codes are matched to NorthWestern Energy LLC (MT) in NREL’s 2024 ZIP file: 82190, 82414, 82421, 82431, 82435, 82441, 82801, 82835, 82838, 82839, 83012, 83013, 83414. Utility boundaries do not follow ZIP lines, so a ZIP can have more than one provider.
Wyoming full-service utilities with similar rates
| Provider | ¢/kWh | Avg bill | Customers |
|---|---|---|---|
| Montana-Dakota Utilities Co | 11.96¢ | $101 | 14,993 |
| Powder River Energy Corp | 12.20¢ | $141 | 15,548 |
| City of Gillette (WY) | 12.90¢ | $115 | 14,134 |
| Black Hills Power, Inc. | 13.77¢ | $106 | 2,179 |
| High Plains Power Inc | 14.24¢ | $135 | 12,868 |
| High West Energy, Inc | 14.72¢ | $144 | 5,692 |
| PacifiCorp | 15.13¢ | $107 | 118,517 |
| Cheyenne Light Fuel & Power | 17.32¢ | $91 | 44,072 |
Sources
- U.S. Energy Information Administration, Annual Electric Power Industry Report, Form EIA-861, 2025 final data (f8612025.zip, file dated October 7, 2026): Sales to Ultimate Customers, Average Monthly Bill and Service Territory tables.
- EIA Form EIA-861, 2024 final data (f8612024.zip, file dated December 4, 2025), for the 2024 comparison.
- EIA Electric Power Monthly, Table 5.6.A (average price by state, August 2026 and August 2025; 2026 values are preliminary), file dated October 22, 2026.
- National Renewable Energy Laboratory via OpenEI, U.S. Electric Utility Companies and Rates: Look-up by Zipcode (2024) (investor-owned and other utilities, files dated November 10, 2025), used only to match ZIP codes to utilities.
Average price = residential revenue ÷ residential kWh sold, as reported to EIA. It includes fixed monthly charges, taxes passed through in revenue and seasonal tiers, averaged over the year. Your own rate depends on your tariff and usage.