Why We Have Dates for the Arizona Monsoon

In 2008, the National Weather Service decided to start the Arizona Monsoon every summer on June 15 and end it on September 30. Before that, forecasters tracked dewpoints and looked for three consecutive days of dewpoints of 55-degrees or more to decide the “monsoon had arrived” for the year. Tony Haffer, who spearheaded the change, was the head of the National Weather Service office in Phoenix at the time and talked with Royal Norman on the latest installment of the First Alert Beyond the Green Screen Podcast.

Lovers of Arizona, join us under the Sonoran Sky! Each week, Arizona's Family First Alert Meteorologists will bring you in-depth and entertaining conversations on our state's weather, natural wonders, gardening, hiking, and outdoor activities. Your time under the Sonoran Sky will help you understand how the weather impacts your life.