The ARM Summer Training and Science Applications event on observations and modeling of aerosol, clouds, and precipitation took place July 15-24, 2015, at the National Weather Center in Norman, Oklahoma. Sponsored by the U.S. Department of Energy and organized by the Atmospheric Radiation Measurement (ARM) Climate Research Facility, this training catered to graduate and postdoctoral students interested in observations and modeling of aerosol, clouds, and precipitation processes.