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Morning Weather Forecast - 5/18/26
We'll kick off the work week with Valley highs in the 80s. A gradual warming trend will raise temps back into the triple digits by the weekend.
PHOENIX - A favorable weather pattern brings the state mild air for several days before warming grips the region.
Today:
The forecast high only climbs to 89 degrees in Phoenix on Monday afternoon. The average high for mid-May is 95 degrees. Temperatures will run below normal around Arizona.
The more mild temperatures are the result of a passing storm system. The upper level low is whirling over parts of Utah, Colorado and Wyoming throughout the day. As it moves eastward, an associated cold front drags through Arizona. This front is what keeps temperatures more comfortable in the Valley. The mild air will be slow to shift out of the Southwest, as a secondary disturbance passes through the same area to the north of our state.
Eventually, a ridge will start to strengthen across the Pacific, and will shift eastward toward us. This will force our temperatures upward from late week into this weekend. Winds will remain windy in eastern and northern Arizona today. In the Valley, it will be just a touch breezy the next several days.
The Rest of the Week:
The forecast high hits 92 on Tuesday, 95 on Wednesday and 96 on Thursday in the Valley. Each day will be sunny to mostly sunny. A few clouds are likely across the state Tuesday into Wednesday.
By the weekend, the forecast high returns to the upper 90s and low 100s. It will remain in that territory next week, too.
Big picture view:
No rain is in the forecast this week, as our dry spell continues.
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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)
The Source: Information for this article was gathered by the FOX 10 Weather Experts.