chilling (comparative more chilling, superlative most chilling) 1  Becoming cold. 2  Causing cold. 3  Causing mild fear.
Tucson, Arizona, gets 12 inches of rain per year. The US average is 39. Snowfall is 0 inches. The average US city gets 26 inches of snow per year. The number of days with any measurable precipitation is 31.
In some of the moister parts of the Sonoran Desert, such as areas around Tucson that annually receive an average of ten inches (250 mm) or more precipitation, argillic horizons of some soils may be more than one and one-half feet (H m) thick and parts may contain more than fifty percent clay.