Editing Phoenix, Arizona (section)

==== Recent changes ====
In July 2023, Phoenix became the first major city in the US to have an average monthly temperature of over {{convert|100|°F|0}} with an average daily mean temperature for the month at {{convert|102.7|°F|0}}, which is also the hottest month ever recorded in the city.<ref>{{Cite web |last=Goodykoontz |first=Annie |title=What's the hottest month in Arizona? What to know about record-setting summer temperatures |url=https://www.azcentral.com/story/news/local/phoenix-weather/2024/07/02/july-is-the-hottest-month-arizona-heres-why/74273152007/ |access-date=2024-09-29 |website=The Arizona Republic |language=en-US}}</ref> That same month the city had an unprecedented streak of 31 days with {{convert|110|°F|0}}+ highs that lasted from June 30 to July 30.<ref>{{Cite web |last=US Department of Commerce |first=NOAA |title=Historical Extreme Temperatures in Phoenix and Yuma |url=https://www.weather.gov/psr/ExtremeTemps |access-date=2024-09-29 |website=www.weather.gov |language=EN-US}}</ref> That year the city also had a record 55 days of daily highs topping {{convert|110|°F|0}}+, which also made summer of 2023 the hottest on record there,<ref>{{Cite web |last=Eagerton |first=Audrey |title=After a record-breaking weekend, cooler temperatures and rain chances are expected |url=https://www.azcentral.com/story/news/local/phoenix-weather/2023/09/10/phoenix-hits-new-record-55-days-of-110-plus-temperatures/70818380007/ |access-date=2024-09-29 |website=The Arizona Republic |language=en-US}}</ref> until it was beaten by the summer of 2024 with the hottest ever June at {{convert|97.0|°F|0}},<ref>{{Cite web |first= |date=June 2024 |title=June 2024 Climate Summary |url=https://www.weather.gov/media/psr/Climate/June2024Climate.pdf |access-date=29 September 2024 |website=National Weather Service, Phoenix, Arizona}}</ref> the third hottest August<ref>{{Cite web |first= |date=August 2024 |title=August 2024 Climate Summary |url=https://www.weather.gov/media/psr/Climate/August2024Climate.pdf |access-date=29 September 2024 |website=National Weather Service, Phoenix, Arizona}}</ref> at {{convert|98.7|°F|0}} and the 2nd hottest July record at {{convert|101.1|°F|0}} by average daily temperature respectively.<ref>{{Cite web |first= |date=July 2024 |title=July 2024 Climate Summary |url=https://www.weather.gov/media/psr/Climate/July2024Climate.pdf |access-date=29 September 2024 |website=National Weather Service, Phoenix, Arizona}}</ref> That same year in 2024, it also recorded an unprecedented 113 day streak of daily highs topping {{convert|100|°F|0}}+ that lasted from May 27 to September 16 and ultimately recorded a record 70 {{convert|110|°F|0}} days in a single year, ending by October 7.<ref>{{Cite web |last=Speck |first=Emilee |date=2024-09-18 |title=Phoenix finally snaps record streak of triple-digit temperatures after 113 days |url=https://www.foxweather.com/weather-news/phoenix-100-degree-temperature-streak-ends |access-date=2024-09-29 |website=FOX Weather |language=en-US}}</ref><ref>{{Cite web |last=National Weather Service |first=NOAA |title=Historical Extreme Temperatures in Phoenix, Yuma, and El Centro |url=https://www.weather.gov/psr/ExtremeTemps |access-date=2025-01-13 |website=www.weather.gov |language=EN-US}}</ref>  Because extreme heat is so common, nearly all homes in Phoenix have [[air conditioning]], though poorer residents may not be able to afford to repair or operate them when needed.<ref>{{Cite journal |last1=Jones |first1=Andrew |last2=Nock |first2=Destenie |last3=Samaras |first3=Constantine |last4=Qiu |first4=Yueming (Lucy) |last5=Xing |first5=Bo |date=2023-12-01 |title=Climate change impacts on future residential electricity consumption and energy burden: A case study in Phoenix, Arizona |journal=Energy Policy |volume=183 |pages=113811 |doi=10.1016/j.enpol.2023.113811 |issn=0301-4215|doi-access=free |bibcode=2023EnPol.18313811J }}</ref>

Maricopa County, which includes Phoenix, was ranked seventh for most [[Tropospheric ozone|ozone pollution]] in the United States according to the [[American Lung Association]].<ref>{{Cite news|url=https://www.azcentral.com/story/news/local/arizona-environment/2019/04/24/phoenix-ranked-7th-most-ozone-pollution-nation/3553111002/|title=Phoenix ranked seventh for most ozone pollution in the nation, receives 'F' on new report|last=Totiyapungprasert|first=Priscilla|date=April 24, 2019|work=The Arizona Republic|publisher=Arizona Republic}}</ref> Vehicle emissions are cited as precursors to ozone formation. Phoenix also has high levels of [[Particulates|particulate]] pollution; although, cities in California lead the nation in this hazard.<ref>{{Cite web|title=California Air Quality Report Card|url=https://www.lung.org/research/sota/city-rankings/states/california|access-date=December 29, 2021|website=www.lung.org|language=en}}</ref> PM2.5 particulate matter, which is a component of diesel engine exhaust, and larger PM10 particles, which can come from dust, can both reach concerning levels in Phoenix.<ref>{{Cite web|url=https://www.lung.org/local-content/_content-items/about-us/media/press-releases/new-report-phoenix-air.html|title=New Report: Phoenix Air Quality Worsened for Pollution|website=American Lung Association|language=en|access-date=September 10, 2019}}</ref> In fact, people, pets, and other animals exposed to high concentrations of PM10 dust particles―primarily from dust storms or from disturbed agricultural or construction sites―are at risk of contracting [[Valley Fever]], a fungal lung infection.<ref>{{Cite web|url=https://www.mayoclinic.org/diseases-conditions/valley-fever/symptoms-causes/syc-20378761|title=Valley Fever|website=Mayo Clinic|language=en|access-date=September 13, 2020}}</ref>

Unlike most desert locations which have drastic fluctuations between day and nighttime temperatures, the [[urban heat island]] effect limits Phoenix's [[diurnal temperature variation]].<ref>{{Cite magazine|last=Matthew|first=Rozsa|date=February 1, 2021|title=Why Phoenix may be uninhabitable by the end of this century|url=https://www.salon.com/2021/01/31/why-phoenix-may-be-uninhabitable-by-the-end-of-this-century/|access-date=February 1, 2021|magazine=Salon|language=en}}</ref> As the city has expanded, average summer low temperatures have been steadily rising. Pavement, sidewalks, and buildings store the Sun's heat and radiate it at night.<ref>{{cite book |title=Insider's Guide: Phoenix & Scottsdale |publisher=Morris Book Publishing|editor-last=Sirois|editor-first=Kevin |isbn=978-0-7627-7321-3 |edition=7th |year=2012 |page=186}}</ref> The daily normal low remains at or above {{convert|80|°F|0}} for an average of 74 days per summer.<ref name = NOAA/> On July 19, 2023, at the height of an unprecedent heatwave that caused daily highs to top {{convert|110|°F|0}} or higher that lasted for 31 days straight, Phoenix set its record for the warmest daily low temperature, at {{convert|97|°F|°C|abbr=on}}.<ref name = NOAA/>

[[File:PhoenixDustStorm2.2011.jpg|thumb|upright=1.5|alt=photo of a dust storm, called a haboob, sweeping in over the city of Phoenix|A 2011 [[haboob]]]]

The city averages approximately 300 days of sunshine, or over 85% of daylight hours, per year,<ref>{{cite web|url=http://www.public.asu.edu/~aunjs/ClimateofPhoenix/wxpart1.htm |publisher=Arizona State University |title=Abstract on the Climate of Phoenix |first=Harold |last=Bulk |access-date=March 20, 2016 |archive-url=https://web.archive.org/web/20160119101009/http://www.public.asu.edu/~aunjs/ClimateofPhoenix/wxpart1.htm |archive-date=January 19, 2016 |url-status=dead }}</ref><ref>{{cite news
 |url=http://archive.azcentral.com/relocation/valley101/weather.html
 |newspaper=Arizona Republic
 |title=Weather in the desert covers the spectrum
 |access-date=March 20, 2016
|archive-url=http://arquivo.pt/wayback/20160516044129/http://archive.azcentral.com/relocation/valley101/weather.html
 |archive-date=May 16, 2016
|url-status=dead
}}</ref> and receives scant rainfall―the average annual total at Phoenix Sky Harbor International Airport is {{convert|7.22|in|mm|abbr=on}}. The region's trademark dry and sunny weather is interrupted by sporadic Pacific storms in the winter and the arrival of the [[North American monsoon]] in the summer.<ref name="BATTG19">{{Cite journal|last=Battaglia|first=Steven M.|date=November 1, 2019|title=No Fairy Tale Ending: The Future of Water and the American Southwest|journal=[[Weatherwise]]|volume=72|issue=6|pages=36–43|doi=10.1080/00431672.2019.1659034|bibcode=2019Weawi..72f..36B |s2cid=214466152|issn=0043-1672}}</ref> Historically, the monsoon officially started when the average [[dew point]] was {{convert|55|°F|0}} for three days in a row—typically occurring in early July. To increase monsoon awareness and promote safety, however, the National Weather Service decreed that starting in 2008, June 15 would be the official "first day" of the monsoon, and it would end on September 30.<ref>{{cite web |url=http://phoenix.about.com/od/weather/a/monsoontrivia.htm |title=Phoenix Monsoon Facts |publisher=phoenix.about.com |access-date=February 5, 2014 |archive-date=February 21, 2014 |archive-url=https://web.archive.org/web/20140221201736/http://phoenix.about.com/od/weather/a/monsoontrivia.htm |url-status=dead }}</ref> When active, the monsoon raises humidity levels and can cause heavy localized precipitation, flash floods, hail, destructive winds, and [[Dust storm#Dust storm visibility of ¼ mile or less, or meters or less|dust storms]]<ref>{{cite web |url=http://www.researchhistory.org/2011/07/08/worst-dust-storm-in-arizona-history/ |title=Sweeping Dust Storm in Arizona History |date=July 8, 2011 |publisher=Research History |access-date=February 5, 2014}}</ref>—which can rise to the level of a [[haboob]] in some years.<ref>{{cite news|url=http://www.huffingtonpost.com/2015/06/29/haboob-arizona-phoenix-dust-storm_n_7684654.html |work=HuffPost |title=Haboob Alert! Giant Dust Storms Engulf Phoenix Area, Leaving Thousands Without Power |first=Dominique |last=Mosbergen |date=June 29, 2015 |access-date=March 20, 2016 |archive-url=https://web.archive.org/web/20160331161828/http://www.huffingtonpost.com/2015/06/29/haboob-arizona-phoenix-dust-storm_n_7684654.html |archive-date=March 31, 2016 |url-status=dead }}</ref>
{{Phoenix weatherbox}}