Electricity Price Volatility by State
Volatility measures how much a state's electricity rate fluctuates over time. A higher standard deviation indicates more price variability. This analysis uses monthly rate history where available.
Most volatile states
- Hawaii — std dev: 8.746¢, range: 37.99¢ (307 months)
- California — std dev: 6.455¢, range: 25.17¢ (307 months)
- Massachusetts — std dev: 5.833¢, range: 22.22¢ (307 months)
Most stable states
Full volatility table
| State | Mean (¢) | Std Dev (¢) | Min (¢) | Max (¢) | Range (¢) | Months |
|---|---|---|---|---|---|---|
| Hawaii | 30.37 | 8.746 | 14.73 | 52.72 | 37.99 | 307 |
| California | 18.32 | 6.455 | 10.08 | 35.25 | 25.17 | 307 |
| Massachusetts | 18.98 | 5.833 | 10.50 | 32.72 | 22.22 | 307 |
| Rhode Island | 18.31 | 5.671 | 9.29 | 35.61 | 26.32 | 307 |
| Connecticut | 19.80 | 5.488 | 10.23 | 34.48 | 24.25 | 307 |
| Maine | 17.11 | 4.673 | 10.66 | 32.41 | 21.75 | 307 |
| New Hampshire | 17.97 | 4.535 | 11.26 | 32.26 | 21.00 | 307 |
| Alaska | 18.83 | 4.473 | 11.22 | 28.83 | 17.61 | 307 |
| Michigan | 13.72 | 3.861 | 7.88 | 23.05 | 15.17 | 307 |
| District of Columbia | 12.80 | 3.748 | 6.20 | 25.41 | 19.21 | 307 |
| New York | 18.58 | 3.466 | 12.69 | 29.99 | 17.30 | 307 |
| Maryland | 13.04 | 3.390 | 6.74 | 22.30 | 15.56 | 307 |
| Vermont | 16.88 | 3.166 | 12.04 | 25.16 | 13.12 | 307 |
| New Jersey | 15.31 | 3.130 | 9.34 | 25.32 | 15.98 | 307 |
| West Virginia | 9.95 | 3.045 | 5.90 | 16.80 | 10.90 | 307 |
| Pennsylvania | 13.24 | 2.927 | 8.74 | 21.73 | 12.99 | 307 |
| Indiana | 11.03 | 2.917 | 6.08 | 18.15 | 12.07 | 307 |
| Illinois | 12.04 | 2.915 | 7.27 | 23.85 | 16.58 | 307 |
| Wisconsin | 13.04 | 2.886 | 7.46 | 19.74 | 12.28 | 307 |
| Minnesota | 11.50 | 2.680 | 7.02 | 17.52 | 10.50 | 307 |
| Alabama | 11.29 | 2.647 | 6.33 | 17.41 | 11.08 | 307 |
| Ohio | 11.82 | 2.641 | 7.40 | 19.52 | 12.12 | 307 |
| Delaware | 12.91 | 2.597 | 7.61 | 19.38 | 11.77 | 307 |
| Kansas | 11.11 | 2.548 | 6.81 | 15.78 | 8.97 | 307 |
| Kentucky | 9.54 | 2.481 | 5.14 | 15.02 | 9.88 | 307 |
| Oregon | 10.04 | 2.427 | 5.68 | 16.32 | 10.64 | 307 |
| Missouri | 9.93 | 2.425 | 5.87 | 16.22 | 10.35 | 307 |
| Colorado | 11.39 | 2.401 | 6.71 | 17.13 | 10.42 | 307 |
| Virginia | 11.00 | 2.361 | 6.84 | 17.61 | 10.77 | 307 |
| South Carolina | 11.43 | 2.305 | 7.31 | 17.06 | 9.75 | 307 |
| Georgia | 10.91 | 2.253 | 6.42 | 16.36 | 9.94 | 307 |
| Arizona | 11.31 | 2.192 | 6.99 | 16.03 | 9.04 | 307 |
| South Dakota | 10.25 | 2.171 | 6.52 | 15.73 | 9.21 | 307 |
| New Mexico | 11.43 | 2.106 | 7.41 | 16.52 | 9.11 | 307 |
| North Dakota | 9.26 | 2.096 | 5.60 | 14.12 | 8.52 | 307 |
| Tennessee | 9.79 | 2.086 | 6.11 | 15.08 | 8.97 | 307 |
| Wyoming | 9.91 | 2.085 | 6.01 | 15.24 | 9.23 | 307 |
| Nebraska | 9.55 | 2.081 | 5.26 | 13.85 | 8.59 | 307 |
| Washington | 8.83 | 2.039 | 4.95 | 14.95 | 10.00 | 307 |
| Idaho | 8.82 | 2.008 | 5.21 | 14.37 | 9.16 | 307 |
| Iowa | 11.10 | 1.993 | 7.65 | 15.99 | 8.34 | 307 |
| Mississippi | 10.63 | 1.973 | 6.45 | 16.76 | 10.31 | 307 |
| Oklahoma | 9.77 | 1.932 | 5.65 | 14.79 | 9.14 | 307 |
| Texas | 11.81 | 1.920 | 7.44 | 16.99 | 9.55 | 307 |
| Florida | 11.57 | 1.889 | 7.61 | 15.92 | 8.31 | 307 |
| Montana | 10.12 | 1.859 | 6.31 | 15.14 | 8.83 | 307 |
| Utah | 9.56 | 1.858 | 6.17 | 14.12 | 7.95 | 307 |
| North Carolina | 10.72 | 1.815 | 7.53 | 16.25 | 8.72 | 307 |
| Nevada | 12.03 | 1.810 | 7.55 | 17.59 | 10.04 | 307 |
| Arkansas | 9.72 | 1.751 | 6.44 | 14.36 | 7.92 | 307 |
| Louisiana | 9.64 | 1.654 | 6.27 | 14.44 | 8.17 | 307 |
Standard deviation uses the sample formula (n-1). Only states with at least 3 months of history are included. Coverage will expand as more data is collected.