<P> The sun is said to shine during about 90% of the daylight hours, making Yuma the sunniest place in the world . An annual mean sunshine duration of 4,015 h would have been recorded in the desert city . </P> <P> On average, Yuma receives 3.36 inches (85 mm) of rain annually . Even in the wettest year of 2005, only 7.39 in (188 mm) fell . The driest year at Yuma Airport has been 2007, with only 0.15 in (3.8 mm) recorded . On average, August and September are the wettest months of the year, while June is the driest . </P> <P> In 1995, Yuma reached its all - time high of 124 ° F (51 ° C). The lowest recorded temperature was − 6 ° C (21 ° F) on the Yuma - Mesa area in January 2007 . The temperature fell to − 6 ° C (21 ° F) for approximately two hours and harmed many crops grown in and around Yuma . The crop that suffered the most damage was the citrus on the Yuma mesa, most notably the lemon crop . It suffered a 75% to 95% loss of crop and trees, as stated by the Arizona Department of Agriculture in a February 2007 report . On average, the temperature lowers to the freezing mark in less than a quarter of years, and there are 118 days per year that reach or exceed 100 ° F (38 ° C), usually from April through October . During July and August the temperature fails to reach the century mark on at most, only a few days . </P> <P> In 1997, the desert city sustained a full tropical storm after Hurricane Nora made landfall at the mouth of the Colorado River and quickly moved due north along it . This rare event cut power to 12,000 customers in Yuma, and dropped 3.59 inches (91 mm) of rain at Marine Corps Air Station Yuma . The last time a hurricane had hit near Yuma was in mid-August 1977, when similar falls were recorded . </P>

What is the highest temperature in yuma az