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Morning Weather Forecast - 3/17/26
The heat is on! Today could be our last day under triple digits in the Valley until next week.
PHOENIX - The heat is on, and it's only getting hotter!
An exceptionally strong ridge of high pressure is building over the southwest and will center over Arizona by Wednesday. As this happens, the forecast highs climb from near-record level to record-smashing level.
This Week:
Sunny and dry conditions last all week with our climbing temperatures. Tuesday, the forecast high jumps to the upper 90s and by Wednesday, the first triple digit day of 2026 is in the forecast.
We're expecting to reach a high of 101 on Wednesday. What is more shocking, the temperature will continue to jump to around 105 through the end of the work week. The forecast high is 104 on Thursday and 106 on Friday with a high of 105 Saturday and 102 Sunday.
Dig deeper:
Currently, the all-time record temperature for March in Phoenix is 100 degrees. The all-time record for April in Phoenix is 105 degrees. This week we may break both records. The current record for 90+ degree days in a row in March is six days. We'll also blast through that record.
Finally, we'll set a record for the earliest triple-digit day. The current record is March 26, set in 1988.
In addition to setting records in Phoenix, much of the state will see record high temperatures and even all-time records. In fact, the whole region will begin setting records in the next couple of days.
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.
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. +103degrees, 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
Road Conditions
- Call 511 anywhere in Arizona or 1-888-411-ROAD (7623)
- az511.com
The Source: Information for this story was gathered from the FOX 10 Weather Experts.