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The city averages approximately 300 days of sunshine, or over 85% of daylight hours, per year, [14] [15] and receives scant rainfall―the average annual total at Phoenix Sky Harbor International Airport is 7.22 in (183 mm).
Arizona has an average annual rainfall of 12.7 in (323 mm), [62] which comes during two rainy seasons, with cold fronts coming from the Pacific Ocean during the winter and a monsoon in the summer. [63] The monsoon season occurs toward the end of summer. In July or August, the dewpoint rises dramatically for a brief period.
Climate data for Phoenix Int'l, Arizona ... Average precipitation days (≥ 0.01 in) 3.8 4.1 ... Mean monthly sunshine hours: 256.0 257.2
During El Niño events, precipitation averages about 10 percent above normal, while La Niña events lead to precipitation amounts which average close to 10 percent below normal. [79] Pago Pago harbor in American Samoa has the highest annual rainfall of any harbor in the world. [80] This is due to the nearby Rainmaker Mountain. [80]
The city averages approximately 300 days of sunshine, or over 85% of daylight hours, per year, [130] [131] and receives scant rainfall―the average annual total at Phoenix Sky Harbor International Airport is 7.22 in (183 mm).
Annual average humidity values vary from 55% in Flagstaff to 23% in Yuma. Due to the high temperatures, low humidity, and occurrence of sunshine, Arizona has high rates of evaporation. Average annual lake evaporation varies from about 80 inches (2,000 mm) in the southwestern part of the state to about 50 inches (1,300 mm) in the northeast. [4]
Arizona beckons to retirees for a number of reasons, ranging from its great climate to its senior-friendly population and tax-friendly financial opportunities. But how much do retirees really need ...
The city receives precipitation every year, with two distinct wet periods in the summer and winter; the summer monsoon season accounts for 34% of annual rainfall, with the winter producing 28%. The summer monsoon season, originating from the Mexican monsoon period, is also wetter than winter, with an average 7 inches (180 mm) compared to the ...