Heat in Arizona

Events

805

Deaths

1,326

Injuries

39

Damage

None recorded

• Excessive Heat and Heat in Arizona, July 23 to 29, 2023114 deaths · 32 eventsA persistent strong ridge of high pressure over the region led to well above normal temperatures for the end of July. Afternoon highs during this time exceeded 110 degrees each day in Phoenix with the 25th recording a high of 119 degrees.
• Excessive Heat and Heat in Arizona, July 19 to 23, 202281 deaths · 35 eventsAn anomalously strong ridge of high pressure over the Desert Southwest persisted into the latter part of July, leading to temperatures in excess of 110 degrees in Phoenix most days during this time.
• Excessive Heat and Heat in Arizona, July 14 to 30, 202366 deaths · 10 eventsPersistent strong high pressure aloft created an extended period of very hot temperatures July 14-30 across southeast Arizona. High temperatures were 5 to 14 degrees above normal causing the Major Heat Risk category to be reached and numerous high temperatures to be established.
• Excessive Heat and Heat in Arizona, July 14 to 18, 202264 deaths · 20 eventsA strong upper level ridge situated over the Desert Southwest led to well above normal temperatures along with excessive heat conditions at times. Temperatures during this time at Phoenix Sky Harbor peaked on the 16th at 114 degrees.
• Excessive Heat and Heat in Arizona, August 1 to 7, 202358 deaths · 38 eventsA strong ridge of high pressure over the Southern Plains expanded westward into the Desert Southwest, leading to excessive heat conditions across the region.
• Excessive Heat and Heat in Arizona, July 8 to 13, 202255 deaths · 37 eventsA strong ridge of high pressure became situated over the Four Corners region, leading to dangerous temperatures as well as excessive heat conditions at times across the Phoenix area.
• Excessive Heat and Heat in Arizona, July 6 to 11, 202149 deaths · 23 eventsStrong high pressure encompassing the Desert Southwest led to above normal temperatures, with excessive heat conditions occurring across the Phoenix area between the 9th and 11th.
• Excessive Heat and Heat in Arizona, July 9 to 14, 202047 deaths · 36 eventsA very strong area of high pressure strengthened over the southwest United States, leading to excessive heat conditions across the region. Temperatures in Phoenix exceeded 110 degrees each day with afternoon highs reaching or exceeding 115 degrees on the 11th and the 12th.
• Excessive Heat and Heat in Arizona, June 26 to 30, 202444 deaths · 14 eventsThe Desert Southwest was under the influence of a strong ridge of high pressure, leading to afternoon temperatures topping out each day at or above 110 degrees in Phoenix.
• Excessive Heat and Heat in Arizona, August 1 to 6, 202040 deaths · 34 eventsA very strong area of high pressure parked over the Southwest United States led to continued excessive heat conditions across the region from the end of July into the beginning of August.
• Excessive Heat and Heat in Arizona, June 6 to 12, 202236 deaths · 34 eventsA strong ridge of high pressure built in across the Southwest heading into the middle part of June, bringing excessive heat conditions to the region.
• Excessive Heat and Heat in Arizona, August 2 to 7, 201831 deaths · 39 eventsStrong high pressure over the Desert Southwest led to excessive heat warning conditions near the beginning of the month. The deadly heatwave resulted in 31 fatalities (27 direct and 4 indirect) according to the Maricopa County Department of Public Health.
• Excessive Heat and Heat in Arizona, July 18 to 22, 202031 deaths · 18 eventsStrong high pressure led to temperatures climbing near to slightly above 110 degrees during a several day period for the latter part of July. According to the Maricopa County Department of Public Health, 31 heat-associated fatalities occurred during this time.
• Heat in Arizona, July 18 to 23, 202130 deaths · 14 eventsThe strong monsoon high centered over the Four Corners led to temperatures approaching 110 degrees at times in Phoenix. Temperatures most nights were 3-4 degrees above normal as lows remained in the upper 80s.
• Heat in Arizona, July 12 to 21, 200530 deaths · 1 eventThis was the third warmest July on record in Phoenix. The average monthly temperature was 97.3 degrees, just 4 tenths of a degree shy of the record warmest July which was set in 2003. The average maximum temperature for the month was 109.5 compared to a normal of 106.6 degrees.
• Excessive Heat and Heat in Arizona, June 9 to 16, 202429 deaths · 28 eventsA ridge of high pressure over the Desert Southwest resulted in excessive heat conditions during the middle part of June.
• Excessive Heat and Heat in Arizona, July 26 to 31, 202026 deaths · 35 eventsAnomalously strong high pressure over the Southwest led to temperatures climbing at or above 115 degrees. Temperatures peaked in Phoenix on the 30th at 118 degrees, which ended up being the hottest day of the year.
• Excessive Heat and Heat in Arizona, July 6 to 10, 202326 deaths · 19 eventsThe Desert Southwest continued to remain under the influence of an upper level ridge of high pressure during the July 6-10th time period. As a result, high temperatures in Phoenix continued to reach or exceed 110 degrees each day with the 6th reaching a high of 115 degrees.
• Excessive Heat and Heat in Arizona, July 8 to 12, 202426 deaths · 10 eventsHot temperatures typically 7 to 11 degrees above normal were experienced across southeast Arizona July 8-12.
• Excessive Heat and Heat in Arizona, July 22 to 27, 201825 deaths · 39 eventsStrong high pressure building into the region resulted in excessive heat warning conditions across much of south-central and southwest Arizona. The deadly heatwave resulted in 25 fatalities (23 direct and 2 indirect) according to the Maricopa County Department of Public Health.
• Excessive Heat and Heat in Arizona, August 1 to 6, 202125 deaths · 31 eventsA strong ridge of high pressure over the Desert Southwest resulted in excessive heat conditions as temperatures climbed well above normal. The hottest day in Phoenix occurred on the 4th with a high of 115 degrees.
• Excessive Heat and Heat in Arizona, July 27 to 31, 201925 deaths · 17 eventsStrong high pressure over the Desert Southwest near the end of the month led excessive heat warning conditions for parts of the region. The deadly heat resulted in 25 fatalities (20 direct and 5 indirect) according to the Maricopa County Department of Public Health.
• Excessive Heat and Heat in Arizona, September 1 to 7, 202225 deaths · 16 eventsAn anomalously strong ridge of high pressure, with 500 mb heights around 594 dm, was parked over the western CONUS for the start of September. This resulted in well above normal temperatures as well as excessive heat conditions at times.
• Heat in Arizona, August 9 to 14, 202324 deaths · 11 eventsAn upper level ridge shifted into the Interior Mountain West from the eastern Pacific during the period between the 9-14th, keeping temperatures above normal during this time.
• Heat in Arizona, July 15 to 17, 202024 deaths · 3 eventsThe Desert Southwest remained under the influence of persistent strong high pressure during the middle part of July. During this time, temperatures peaked around 110 degrees each day.

Heat everywhereEvery kind of event in Arizona

NOAA National Centers for Environmental Information, Storm Events Database, compiled from the National Weather Service’s monthly Storm Data. Complete through 2026-06; NCEI adds each month about 75 days after it ends and revises past years a few times a year. Rebuilt 2026-09-24.