Arizona weather forecast: Very warm Friday in Phoenix, but slightly cooler temps this weekend (2025)

5 PM Weather Forecast - 9/6/24

We have updated our 10-day forecast with one day in the double digits!

PHOENIX - We'll see very warm temps on Friday in the Valley, as an Excessive Heat Warning remains in effect.

The high in Phoenix on Sept. 6 will be about 109°F. The Excessive Heat Warning is scheduled to expire at 8 p.m.

As for this weekend in the Valley, we'll see slightly cooler temps.

"Temperatures cool even more this weekend, however, they will still be above normal," the National Weather Service Phoenix wrote on X.

A record was set at Sky Harbor for an overnight low temperature. The thermometer reached just 93°, breaking the previous record of 89° set in 2020, according to NWS.

You can always check the latest weather conditions by visiting the FOX 10 Phoenix weather page, or download theFree FOX 10 Weather app, which is available onApple iOSandAndroid.

Scroll down this page for satellite and radar, day planner, records, current temperatures, 10-day forecast, forecast highs, and recent rainfall totals, plus live video feeds.

Arizona weather forecast: Very warm Friday in Phoenix, but slightly cooler temps this weekend (1)

Arizona weather forecast: Very warm Friday in Phoenix, but slightly cooler temps this weekend (2)

Arizona weather forecast: Very warm Friday in Phoenix, but slightly cooler temps this weekend (3)

Arizona weather forecast: Very warm Friday in Phoenix, but slightly cooler temps this weekend (4)

Arizona weather forecast: Very warm Friday in Phoenix, but slightly cooler temps this weekend (5)

The following heat safety information was provided by the Scottsdale Fire Department.

What are Heat Emergencies?

Heat Cramps: Profuse sweating, fatigue, extreme thirst, muscle cramps

Heat Exhaustion: Headache, dizziness, weakness, nausea/vomit, Cool/moist skin

Heat Stroke: Elevated temp. +103 degrees, confusion/irrational behavior, dry/hot skin, rapid shallow breathing, rapid weak pulse (shock), seizures, unconscious

What to do

  • Get person into shade or cool location
  • Cool person with cool, wet cloths (neck, groin, armpits, head) and fan body
  • Sip cool water if person is alert
  • For muscle cramps, massage muscles gently, but firmly until relaxed
  • *If symptoms worsen, call 911

What not to do

  • Do not give anything by mouth if person is vomiting, unable to swallow or unconscious
  • Do not underestimate the seriousness of a heat emergency
  • Prevention/Preparation for hike/exercise in heat

Know your limitations

  • Hydrate (begins day prior to hike/exercise, hour before hike, during and after)
  • Wear proper clothing, lightweight and light color, protect head, proper shoes
  • Always carry a cell phone and best to hike with company
  • Always tell someone where you are hiking and when to plan to return

Preventing heat exhaustion/heat stroke

The Arizona Department of Health Services stated the following precautions can be taken to prevent heat exhaustion or heat stroke:

  • Stay in air-conditioned buildings
  • Find a cooling center/hydration station
  • Limit outdoor activity during the hottest part of the day (mid-day)
  • Check on at-risk friends, family, and neighbors at least twice a day
  • Drink water before, during, and after working or exercising outside
  • Check the UV Index
  • Check the heat risk map

Driving in extreme temperatures

The Arizona Department of Transportation’s tips for driving in extreme temperatures include:

Have sun protection: In addition to an umbrella, take sunscreen and a wide-brimmed hat and wear loose-fitting, light-colored cotton clothing.

Fuel up: Keep your tank at three-quarters full. Running out of gas, especially in a remote location, is dangerous in extreme heat.

Hydrate: Take a cooler to keep extra drinking water cold, and consider adding several frozen bottles of water to use for cooling off or to thaw and drink if needed. Make sure everyone, including pets, stays hydrated.

Get help: If your vehicle breaks down in extreme heat, call for assistance right away to reduce wait time, and run the AC. If the AC isn’t working, roll down all windows.

Wait safely: If the temperature inside your vehicle becomes too hot, everyone, including pets, should exit carefully and seek out or create a shaded area as far away from the travel lanes as possible. Be careful walking on the road surface, which can be hot enough to burn skin. Keep your shoes on and try to keep your pets’ paws off the pavement. If you are stopped along the highway, raise the front hood and turn on hazard lights. Please keep in mind that parking in tall brush can start a fire.

Check your vehicle: You can help avoid breakdowns and blowouts by making sure your vehicle is in good operating condition. Check your air conditioner and coolant levels, top off any vital engine fluids and make sure your battery is up to par. Check your tire pressure, as the combination of under inflated tires and hot pavement can lead to a blowout.

Preparing for a severe thunderstorm

The American Red Cross' tips for preparing for a severe thunderstorm:

  • Put together an emergency kit.
  • Know your community’s evacuation plan.
  • Create a household disaster plan and practice it.
  • Purchase a battery-powered or hand-crank radio
  • Discuss thunderstorm safety with members of your household. Be aware that a thunderstorm could produce flooding.
  • Pick a safe place in your home for household members to gather during a thunderstorm. This should be a place where there are no windows, skylights, or glass doors, which could be broken by strong winds or hail and cause damage or injury.

Be prepared and stay safe during the monsoon

"Most Valley residents know how quickly and furiously storms can move in and out, bringing strong winds, dust, rain, and flash flooding. These storms can cause interruptions in services, such as water, power, and gas," stated Captain Ashley Losch of the Glendale Fire Department.

GFD reminds residents of ways they can be prepared and stay safe:

  • Have flashlights with extra batteries on hand.
  • Have food that can be prepared without the need for cooking or refrigeration.
  • Have at least one gallon of clean water for each person in the household.
  • Have backup power for anyone requiring power for a medical device.
  • Have backup power for cell phones that do not require charging.
  • Have a first aid kit ready and accessible.
  • Never drive into areas with flowing water; it takes less than 10 inches to wash a car away.
  • Avoid flooded areas, such as washes.
  • If waters are rising, seek higher ground.
  • Do not approach downed power lines, the ground can be energized for up to 200 feet.
  • Keep pets indoors during storms.

MORE:https://azdot.gov/about/transportation-safety/severe-weather

Arizona weather forecast: Very warm Friday in Phoenix, but slightly cooler temps this weekend (2025)

FAQs

What temperature is considered excessive heat in Arizona? ›

Extreme heat is defined as a period of at least 2-3 days of high heat with temperatures above 90 degrees.

Why is Phoenix hotter than the rest of Arizona? ›

Phoenix's low altitude causes the temperature to rise because there is more air above the city, which increases the air pressure. This shoots up the temperature, and explains why most deserts are below sea level.

How hot has it gotten in Phoenix Arizona? ›

Extreme Temperature Facts for Phoenix,Yuma, and El Centro
Phoenix Period of Record (POR) (1896-2023)
Longest stretch of 110°F or greater days31 (30 Jun 2023 - 30 Jul 2023)
Top 5 Hottest Days1. 122 (26 Jun 1990) 2. 121 (28 Jul 1995) 3. 120 (25 Jun 1990) 4. 119 (25 Jul 2023) 119 (20 Jul 2023 and 2 other times)
22 more rows

What is the weather phenomenon in Arizona? ›

The North American Monsoon in Arizona. The North American Monsoon is a well-defined meteorological event that occurs during the summer throughout southwestern North America, including Arizona, New Mexico, Colorado, Utah, and sometimes California, Nevada, and Texas.

Is Arizona going to have a hot summer in 2024? ›

The summer of 2024 ended Saturday as the hottest on record in Phoenix, melting the old mark by 2 degrees just a year after it was set.

Is Arizona heat or Florida heat worse? ›

In Orlando, Florida, 98 degrees with 78% humidity will make you feel like you just stepped into a hot shower, but 112 degrees in Phoenix, Arizona, with 16% humidity will feel extremely hot. However, the way your body responds to the heat with less moisture in the air is a little different.

Will Phoenix be uninhabitable in 20 years? ›

Maricopa county, home to Phoenix, is one of six counties in Arizona at risk of becoming uninhabitable to humans in the next 20 to 40 years. More than 150 people died in 2016, 2017 and 2018 from the effects of heat waves in Phoenix.

What state is hotter than Arizona? ›

Measuring Average Temperature Across the U.S.

Based on the average daily temperature, its top 10 was (in ascending order): Florida, Hawaii, Arizona, Texas, Louisiana, Mississippi, Nevada, Alabama, Georgia and South Carolina.

Which is hotter Las Vegas or Phoenix? ›

Phoenix is a little more humid than Southern Nevada, but definitely nothing like what you would expect from Florida or other Southeastern states. Average daily highs in the middle of summer are 101°-105° in Las Vegas. In Phoenix they are about 104°-106°. In the winter, both cities have very livable temperatures.

Has Phoenix hit 100 degrees in 2024? ›

It's always hot this time of year in central Arizona, but 2024 is proving to be an endless summer with especially high temperatures in Phoenix. On Tuesday, the city hit its 100th straight day with at least 100 degree temperatures.

What is the hottest town in Arizona? ›

Lake Havasu City hit 128 degrees on June 29, 1994, making it the hottest temperature ever recorded in the state, according to the National Weather Service. This is just 6 degrees cooler than the record high in Death Valley. The highest temperature recorded in Phoenix was 122 degrees on June 26, 1990.

How many days in a row has Phoenix been over 100? ›

Phoenix Shatters Heat Record With 100 Consecutive Days Above 100 Degrees. Phoenix, Arizona, is the nation's fifth largest city, with roughly five million people living in its metro region. But as it's located in the desert Southwest, it's also one of the hottest.

What is the best area to live in Arizona? ›

1. Tucson, AZ. Tucson tops our list as the best place to live in Arizona. Home to gorgeous weather, a world-renowned cycling race, and surrounded by four mountain ranges providing endless vistas and hiking trails, Tucson is truly an outdoor haven.

What city in Arizona has the nicest weather? ›

It's very sunny around the entire state most of the year. In Phoenix, we see about 300 sunny days. Yuma, in southwest Arizona, is the sunniest city in the state with more than 320 sunny days. Even in Flagstaff, in the mountains, we see about 260 days with sunshine.

What city in Arizona has the coolest summer? ›

Flagstaff – Hiking and outdoor Activities

The city sits at an elevation of over 7,000 feet, which means temperatures rarely exceed 80 degrees Fahrenheit during the summer months. Flagstaff is surrounded by the Coconino National Forest, which offers endless opportunities for hiking, mountain biking, and camping.

What is the heat law in Arizona? ›

When the temperature in the work area exceeds one hundred degrees Fahrenheit, the employer shall provide and maintain at all times while employees are present one or more areas with shade or a climate-controlled environment that are either open to the air or provided with ventilation or cooling.

What temperature is considered excessive heat? ›

Highest heat index 118 degrees (F) or greater. "A High Threat to Life and Property from Excessive Heat." Highest heat index between 113 - 117 degrees (F). Heat Index Values consistent with Excessive Heat Warning criteria.

What temperature is too hot for going outside? ›

If the outside temperature is between 90 and 105 F, it can cause heat cramps. If between 105 and 130 F, heat exhaustion can occur. If above 130 F, it can cause heat stroke. When things reach this point, there can be loss of consciousness, skin can turn red, there can be nausea, vomiting, dizziness, and other symptoms.

What is the temperature danger zone in Arizona? ›

The "Danger Zone" (40 °F-140 °F)

This range of temperatures is often called the "Danger Zone." That's why the Meat and Poultry Hotline advises consumers to never leave food out of refrigeration over 2 hours. If the temperature is above 90 °F, food should not be left out more than 1 hour.

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