A winter that is expected to be warmer than last year will lower heating bills for customers of all fuels, according to the Energy Department’s annual outlook. Heating oil and propane customers will see the biggest declines because fuel consumption will fall and the prices of those fuels are expected to be sharply lower than last year. Natural gas and electricity prices are expected to rise, but lower consumption will lower overall bills slightly. Below are the Energy Departments predictions for average heating costs by fuel between October 1 and March 31.