Monsoon: The Malaysian Meteorological Service tells you what a monsoon is, and how to prepare.
Monsoons and Zenithal Rain: Defines what is needed for there to be a monsoon, and describes where they occur.
Mr. Dowling's Electronic Passport: Moonsoon: India's climate is dominated by monsoons, seasonal winds that bring torrentail rainfall during the summer. How they effect India's climate.
National Weather Service: Tucson: Describes what a monsoon is, and has statistics of previous monsoons in Arizona, United States.
Nature: Monsoon: Describes the weather differences during a monsoon on the Indian subcontinent.