The average value from all these simulations are then recorded. With all available gages within 40 miles of Downtown Phoenix, 30 gages are randomly selected and their average and percent with measurable rain are computed. To generate the averages, a Monte Carlo simulation is used. The most common error will be light precip amounts at individual gages when no rain actually occurred. Also, please be aware that the rainfall data are only passed through minimal quality control mechanisms. Sky Harbor recorded a total of 4.2 inches of rain this season. When this happens it is reflective of either a very light or very isolated precipitation event. July was the wettest on record for Tucson, one of the main reasons why the season totals ended so high 8.06 inches of rain fell in July. Coupled with mathematical rounding, it is very likely there will be days when precipitation falls across the PMA yet the average rainfall is 0.00". Overall the Phoenix Rainfall Index for July 2021 (that is, the average of all the official rain gauges throughout the Valley), stood at 2. Therefore, any precipitation less than 1 mm/0.04" will not be measured by the rain gages. The FCD rain gages measure precipitation in millimeters (increments of 0.04"). The PRI, based on rain observed within 40 miles of Downtown Phoenix from the Maricopa County Flood Control District's network of ALERT rain gauges across the PMA, provides an average rainfall amount and what percent of gages measured rain. To offer a companion measurement to the official observations at KPHX, the Phoenix Rainfall Index (PRI) was been created. This is especially true during the monsoon. temperature during June was 72.6☏, 4.2☏ above the 20 th century average, ranking warmest in the 127-year record and surpassing the previous record set in 2016 by 0.9☏. While KPHX did a good job of reprenting rainfall of Phoenix when it was smaller, with the vast sprawl of the area now there are times where portions of the PMA receive rain while other, including KPHX, do not. Since these data are preliminary and created within hours of rainfall, the. Click individual images for larger version click again or use arrow keys to step through the images. Since 1933, it has resided at Phoenix Sky Harbor International Airport (KPHX). These preliminary observed rainfall graphics are automatically updated every 6 hours to show the latest 6-, 12-, 18-, and 24-hour rainfall totals for standard periods. Historically, the official rain gauge for the Phoenix Metropolitan Area (PMA) has been situated near the center of the city. Therefore, we will likely see periods that are warmer or colder in each respective region of the country when compared to what is shown below.Phoenix, Arizona is a vast, sprawling metropolis which covers an area of nearly 2000 sq-mi. Keep in mind this outlook is an overall three-month trend. Portions of the Northeast and California could trend slightly cooler than average. A broad area from the Four Corners to most other areas of the South northward to the mid-Mississippi Valley and Central Plains are also forecast to be warmer than average. That would come on the heels of what has been a torrid July in those areas. Here's the big picture for August through October: Areas from West Texas into southeastern Arizona are expected to be the hottest relative to average. Summer's leftover heat could spill into early fall in parts of the central and southern United States as relatively cool conditions hug portions of the Northeast and California, according to the latest outlook from The Weather Company, an IBM Business, and Atmospheric G2. Sign up for the Morning Brief email newsletter to get weekday updates from The Weather Channel and our meteorologists. Phoenix Rain Totals 2021Rain This table gives the total precipitation that fell on Phoenix during each year from 2010.
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