Monsoon Rainfall Totals So Far

You could say last night’s thunderstorms inched the monsoon rainfall totals up, but in fact they barely fraction-of-an-inched them up. The shifty storms dropped just 0.04 inches of precipitation in the Anthem area, while about a quarter-inch fell in Tramonto and Sonoran Foothills and 0.39 inches rained down in the Norterra area. Parts of North Scottsdale got nearly an inch, and more than a half-inch fell in several spots in the Valley.

The graphic shows totals in North Phoenix for the entire monsoon (a season that runs June 15 to Sept. 30.) through 5 a.m. this morning [map of the gauges below]:

monsoon rainfall totals north phoenix

Most of the gauges in and around North Phoenix don’t have long historical records, but the state climatologist, Nancy Selover, says those at Anthem North and Deer Valley Airport have each averaged about 2.85 inches over the last 30 monsoons.


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There’s still of time for the totals to reach norms, but not a lot. August is typically the wettest month of this large-scale, seasonal shift in wind and weather we call the monsoon, bringing more than an inch of rain locally. September typically contributes more than a half-inch, but most of that usually falls by mid-month.

The forecast calls for mostly clear skies today and through the weekend, with a 10 percent chance of showers Monday and Tuesday.

monsoon storm lightning
Rain and lightning seen from Anthem during a monsoon storm in 2016. Photo: Marius Britt
rain gauge locations
Rain gauges monitored by the Maricopa County Flood Control District in the North Phoenix Area.
Robert Roy Britt

NoPho resident Robert Roy Britt has written for In&Out publications since its inception in 2005. Britt began his journalism career in New Jersey newspapers in the early 1990s. He later became a science writer and was editor-in-chief of the online media sites Space.com and Live Science. He has written four novels.


Robert Roy Britt on Email

Robert Roy Britt

NoPho resident Robert Roy Britt has written for In&Out publications since its inception in 2005. Britt began his journalism career in New Jersey newspapers in the early 1990s. He later became a science writer and was editor-in-chief of the online media sites Space.com and Live Science. He has written four novels.

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