Wholesale electricity price (USD / MWh) - United States (CAISO SP15 zone) - EIA STEO - Monthly
This series is part of the dataset: US Wholesale electrictiy prices (monthly)
Download Full Dataset (.xlsx)Latest updates. In the CAISO SP15 zone, the average wholesale electricity price stood at 32.89 USD / MWh in September 2025, compared to 38.71 in August 2025. This marks a reduction of 15.03 percent.
Sample. There are 204 data points overall in the monthly time series presented in the plot above. The time span covered by the series extends from January 2010 to December 2026.
History. Take a look at some simple statistics computed on the whole sample: the price was equal on average to 43.71 USD / MWh; it hit a trough of -0.08 in April 2024; it reached its maximum of 257.11 in December 2022.
Latest values
| Date | Value - USD / MWh |
|---|---|
| 2026-10-31 | 37.30565 |
| 2026-11-30 | 40.92957 |
| 2026-12-31 | 45.12036 |
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Series Metadata
| Field | Value |
|---|---|
| Description | Wholesale electricity price |
| Country or region | US - CAISO SP15 zone |
| Economic concept | Price |
| Data type | Nominal price |
| Seasonally adjusted | No |
| Frequency | Monthly |
| Unit | USD / MWh |
| Source | U.S. Energy Information Administration (EIA) |
| Source type | Government Agency |
| Data licence | Public domain |
| Measure type | Level |
Series in the same data set
Discover the other time series included in this data set.