Blog Autumn is a transitional period when you could easily use the fireplace and the air conditioning on the same day. However, by the time October rolls around in Davenport, Iowa, the average low temperature drops to 41 degrees Fahrenheit. Soon, heaters will be churning, burning, and boiling to life across the Midwest. You can keep energy costs down from the start of the heating season when you prepare for the cold months ahead. Take advantage of the moderate weather in autumn and follow the five tips below to be energy-wise this fall.