The Atmospheric data Community Toolkit (ACT) is an open source Python toolkit for working with atmospheric time-series datasets of varying dimensions. The toolkit is meant to have functions for every part of the scientific process; discovery, IO, quality control, corrections, retrievals, visualization, and analysis. It is meant to be a community platform for sharing code with the goal of reducing duplication of effort and better connecting the science community with programs such as the Atmospheric Radiation Measurement (ARM) User Facility.