This graphic takes the top insurance providers in Tempe, AZ and compares the average monthly cost of their respective premiums against the average cost of $357. The state’s top providers, and the percent difference that is between their average monthly cost and the average cost in the city as a whole are: Allstate (23%), Farmers (37%), GEICO (-55%), Nationwide (-9%), Progressive (-13%), State Farm (17%), and USAA (-31%).