Climate change represents one of the most pressing challenges of our time, directly impacting the achievement of multiple United Nations Sustainable Development Goals (SDGs). This research presents ClimateAware, a web-based platform designed to enhance climate information accessibility and community engagement in support of SDG 13 (Climate Action), SDG 4 (Quality Education), SDG 11 (Sustainable Cities and Communities), and SDG 17 (Partnerships for the Goals). The platform addresses critical gaps in existing climate communication systems by providing localized climate news, real-time updates, community interaction tools, and personalized dashboards. Using a descriptive developmental research design, the system was evaluated through comprehensive testing with 100 participants from Centro Escolar University Manila. Results demonstrate 100% system uptime, 328ms average response time, and high user engagement across different content types. The platform successfully integrates RSS feeds for automated content curation, community forums for knowledge sharing, and event management systems for local climate action coordination. Security testing revealed no vulnerabilities, while compatibility testing confirmed cross-platform functionality. ClimateAware represents a significant contribution to digital climate communication, demonstrating how technology can support SDG achievement through enhanced public awareness, education, and community mobilization for climate action.