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 was 35.22 USD / MWh in August 2025, compared to 33.43 in July. This marks a rise of 5.35 percent.
Sample. There are 204 observations in the monthly time series shown in the graph above. The period covered by the series extends from January 2010 to December 2026.
History. Take a look at some descriptive statistics we calculated on the full sample: the price had a mean value of 43.75 USD / MWh; it hit a trough of -0.08 in April 2024; it recorded its maximum of 257.11 in December 2022.
Latest values
| Date | Value - USD / MWh |
|---|---|
| 2026-10-31 | 37.91654 |
| 2026-11-30 | 42.36376 |
| 2026-12-31 | 45.12321 |
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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 |