On the ICE, May 2015 day-ahead peak electricity prices in PJM, represented by APS Zone and NYISO, began to increase as of May 4, 2015. PJM APS Zone prices rose from 36 USD/MWh on March 4 to 47 USD/MWh on March 8, with prices averaging at 45 USD/MWh throughout the rest of May.
Prices at NYISO Zone A were the most volatile this month, beginning the month at 29 USD/MWh, before climbing to 40 USD/MWh on March 11, ending the observation period at 45 USD/MWh.Prices increased as temperatures dropped from May 5 to 6, and again on May 20.
CAISO prices remained relatively flat throughout the second half of the month, averaging at 34 USD/MWh. By the same token, prices continued flat in the ERCOT North 345KV region, averaging at 27 USD/MWh throughout the month. Higher temperatures pushed electricity prices higher by raising demand for cooling.
Data Sources: ICE