Blood Type Facts: There are eight different common blood types, which are determined by the presence or absence of certain antigens, which are substances that can trigger an immune response if they are foreign to the human body.
Arizonaâs monsoon is the northern extent of the North American Monsoon, which begins in early June in central and southern Mexico.The monsoon is a season, during which the dry westerly winds that persist through fall, winter and spring shift to moist southerly winds, bringing thunderstorm activity into Arizona.
Phoenix experiences some seasonal variation in monthly rainfall. The rainy period of the year lasts for 267 days, from July 10 to April 3, with a sliding 31-day rainfall of at least 0.5 inches. The most rain falls during the 31 days centered around February 19, with an average total accumulation of 1.1 inches.