This report inventories past and present climate monitoring efforts in Pacific Island Inventory and Monitoring Network (PACN). In the report, we provide the following information: Overview of broad-scale climatic factors and zones important to PACN park units; Inventory of weather station locations in and near PACN park units; 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."