<P> The North American monsoon , variously known as the Southwest monsoon , the Mexican monsoon , the New Mexican monsoon , or the Arizona monsoon , is a pattern of pronounced increase in thunderstorms and rainfall over large areas of the southwestern United States and northwestern Mexico , typically occurring between July and mid September . During the monsoon , thunderstorms are fueled by daytime heating and build up during the late afternoon - early evening . Typically , these storms dissipate by late night , and the next day starts out fair , with the cycle repeating daily . The monsoon typically loses its energy by mid-September when drier and cooler conditions are reestablished over the region . Geographically , the North American monsoon precipitation region is centered over the Sierra Madre Occidental in the Mexican states of Sinaloa , Durango , Sonora and Chihuahua . </P>
<P> The North American monsoon , variously known as the Southwest monsoon , the Mexican monsoon , the New Mexican monsoon , or the Arizona monsoon , is a pattern of pronounced increase in thunderstorms and rainfall over large areas of the southwestern United States and northwestern Mexico , typically occurring between July and mid September . During the monsoon , thunderstorms are fueled by daytime heating and build up during the late afternoon - early evening . Typically , these storms dissipate by late night , and the next day starts out fair , with the cycle repeating daily . The monsoon typically loses its energy by mid-September when drier and cooler conditions are reestablished over the region . Geographically , the North American monsoon precipitation region is centered over the Sierra Madre Occidental in the Mexican states of Sinaloa , Durango , Sonora and Chihuahua . </P>
when does monsoon season end in new mexico
when does monsoon season end in new mexico
mid-September
mid-September