Climate is a dominant factor driving the physical and ecologic processes affecting the Arctic Inventory and Monitoring Network (ARCN). In this report, the authors provide the following information: Overview of broad-scale climatic factors and zones important to ARCN park units; Inventory of weather and climate station locations in and near ARCN park units relevant to the NPS I&M Program; Results of an inventory of metadata on each weather station, including affiliations for weather-monitoring networks, types of measurements recorded at these stations, and information about the actual measurements (length of record, etc.); and Initial evaluation of the adequacy of coverage for existing weather stations and recommendations for improvements in monitoring weather and climate."