Arizona weather forecast: Extreme Heat Warning extended in Phoenix

4PM Weather Forecast - 6/17/2025
It's going to stay hot for the rest of the workweek, but relief is in sight for the weekend.
PHOENIX - The heat is on... and it's not going anywhere!
Today:
Temperatures have dropped off several degrees Tuesday, only reaching around 109 degrees, compared to the highs of 114 degrees in Phoenix on Sunday and Monday.
Later This Week:
Hotter temperatures are in the forecast Wednesday and Thursday, climbing to around 115 degrees again on Thursday, with overnight lows staying in the low 80s. Extreme heat warnings will be in effect for southern Arizona, including Maricopa County, from 10 AM Wednesday through 8 PM Friday. This will mean that all City of Phoenix trails will close during that time.
This Weekend:
A pattern change over the weekend will bring breezier winds across the state, including around 25 mph winds to the valley on Friday, Saturday and Sunday. The High Country will see stronger gusts of around 35 to 40 mph. Temperatures will start to drop on Saturday and Sunday.
Next Week:
Finally, by next week, temperatures will be in the low 100s, and cooler than normal for this time in June.
You can always check the latest weather conditions by visiting the FOX 10 Phoenix weather page, or download the Free FOX 10 Weather app, which is available on Apple iOS and Android.
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.

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
Road Conditions
- Call 511 anywhere in Arizona or 1-888-411-ROAD (7623)
- az511.com
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.
MORE: https://azdot.gov/about/transportation-safety/severe-weather