This document offers voluntary guidance to Indigenous communities across Canada for implementing community-based climate monitoring projects. It shares advice on how to collect, record and validate data on key physical climate variables (e.g., temperature, precipitation, sea ice thickness, etc.) consistently and reliably using scientific methods. It also outlines best practices for recording, storing and sharing Indigenous Knowledge related to climate change while respecting Indigenous principles for data collection, analysis and management. This is vital to enable Indigenous communities and individuals who practice traditional activities to adapt to changes in their environment.