When assessing and preparing for the human health effects of climate change, public health practitioners will likely need to access climatological information. Projected climate data, such as future temperature and precipitation, can be used to assess vulnerability and project disease burden. However, state and local health departments often do not have the capacity to utilize climate data or climate projections. This document provides a definition for climate outlooks and climate models and describes particular outlooks and models that may be useful in anticipating the human health effects of climate change. It also includes a topic overview and some suggested initial methods for state and local health departments. This guidance is in accordance with Step 1 of CDCÕs Building Resilience Against Climate Effects (BRACE) framework.