Harlingen electricity prices have decreased slightly over the past 7 days, with the average rate dropping 0.1¢ to 15.73¢/kWh. That translates to about $1/month in savings for a typical 1000 kWh home. With 115 plans available and rates ranging from 8.1¢ to 23.35¢ per kWh, the market remains competitive for South Texas residents.