The contract price for delivery next month fell by as much as 7.9 percent to just over 70 euros per MWh. The decline follows a decline throughout December of nearly 50 percent.
Cheaper gas puts pressure on electricity prices because the fuel accounts for a large part of electricity production in Europe.
Mild weather and forecasts pointing to warmer than normal weather in most of Europe over the next two weeks means that the region does not need to tap into gas stocks.