In May '08 SRP will raise the price of electricity to $9.60/Kwh, still relatively low to S. California which is in average $14.74/Kwh.
For SRP clients living in a 1,000/SF to 1,500/SF home the average energy use (with the new pricing) is $164/Month if you own a pool and $132/Month if you do not own a pool. Again this are just averages and will vary greatly depending on your personal usage.
On my website I have a list of average annual cost of services per city, this includes city property tax, sales tax, sanitation water and sewer. For Tempe it is $1,477.
Hope this helps...
You can also call SW Gas for the same thing on the gas usage. If the gas is only for hot water, it probably won't vary much throughout the year.