The lack of rain in your area does not excuse you from not installing a rain barrel.  

 Madison Rain Barrel

Many homeowners who live in dry areas have air conditioners.  And air conditioners produce water condensate that can be collected in a rain barrel.  This condensate can be recycled for everyday watering of your plants and garden.  All you have to do is to collect the condensate drain pipe from your air conditioner to your rain barrel!

[ More information about collecting air conditioner condensate ]