Despite differing opinions on the topic, ÃÛÌÇÖ±²¥'s monsoon season is already underway, according to Klaus Wolter, an atmospheric scientist at the University of ÃÛÌÇÖ±²¥ at Boulder. In fact, Wolter believes the Southwest monsoon began early this year. The monsoon season, which typically starts around the middle of July in ÃÛÌÇÖ±²¥, actually began at the beginning of the month, said Wolter, a researcher with the Climate Diagnostics Center, part of the Cooperative Institute for Research in Environmental Sciences at ÃÛÌÇÖ±²¥-Boulder.