#6 – San Luis Rio Colorado, Sonora, Mexico
Highest Recorded Temperature: 125.6° F
San Luis Rio Colorado, is located in Northwestern Mexico, on the Colorado River. It is also an international border city, adjacent to San Luis, Arizona. The border city has a desert climate with hot summers and mild winters, making it one of the hottest and driest cities in Mexico. The record high temperature of 125.6° F was recorded on June 25, 1951.