What is the average cost of a Kilowatt Hour of Electricity in 2010?

The average cost of electricity is 12.3 cents per kilowatt hour in 2010. The average cost of the first 500 kWh is about 7.7 cents while the cost of additional kilowatt hours tends to be more. The average cost per kilowatt hour in the months of May through October is 14.4 cents, while the cost per kilowatt hour in the months of November through April is 11.2 cents.