Climate change has been a global threat, however, promoting awareness of climate change will reduce its risk. The study analyzed awareness on three aspects of climate change—causes, impacts, and mitigation among 90 teachers from three high schools, selected using stratified random sampling. We identified a total of 15 statements or variables from each of the causes, impacts, and mitigation to study the teacher’s awareness of climate change. We found that teachers have a medium level of awareness, being more aware of impacts than causes and mitigation of climate change. Three factors– teaching field, education level, and seminar attendance have significantly influenced the teachers’ awareness level on climate change. The result suggests that upgrading education, incorporating environmental studies in educational curriculum, and promoting seminar and workshop on environmental issues increases awareness on climate change.