How a Once-Uncommon Extreme Became a Yearly Milestone. For decades, 110° in Tucson was a milestone we might reach — not a guarantee. In fact, it used to be rare. According to National Weather Service ...

Tucson is on the verge of tying or breaking its record for the most 110-degree days in a single year. So far this year, the city has sweltered through nine 110-degree days. The record of 10 days was ...

Tucson easily broke the 31-year-old record high for the date Tuesday when the thermometer topped off at 112 degrees. That broke the old record of 109, set in 1987. On Monday, Tucson's high tied for ...