Mann was organizing committee chair for the National Academy of Sciences Frontiers of Science in 2003 and has received a number of honors and awards including selection by "Scientific American" as one of the fifty leading visionaries in science and technology in 2002. In 2012 he was inducted as a Fellow of the American Geophysical Union and was awarded the Hans Oeschger Medal of the European Geosciences Union. In 2013, he was elected a Fellow of the American Meteorological Society and awarded the status of distinguished professor in Penn State's College of Earth and Mineral Sciences. In 2017, he was elected a Fellow of the Committee for Skeptical Inquiry.