electricity cost / kwh seattle
1 The average residential electricity rate in Seattle is 7.75Â¢/kWh. 2  This average (residential) electricity rate in Seattle is 9.14% less than the Washington average rate of 8.53Â¢/kWh. 3  The average (residential) electricity rate in Seattle is 34.76% less than the national average rate of 11.88Â¢/kWh. The average industrial electricity rate in Seattle is 5.95Â¢/kWh. 2  This average (industrial) electricity rate in Seattle is 44.07% greater than the Washington average rate of 4.13Â¢/kWh. 3  The average (industrial) electricity rate in Seattle is 10.79% less than the national average rate of 6.67Â¢/kWh.