It's Memorial Day, Phoenix, so get out there and enjoy the (relatively) "cooler" part of the day before summer truly kicks your ass. But don't be a hero.
- The morning is clear and tolerable, offering a decent window for a run or hike before the real heat sets in.
- AQI is moderate at 55, with PM2.5 as the dominant pollutant. Pollen is also moderate. If you've got respiratory issues or allergies, you'll definitely feel it.
- Temperatures will climb to 96°F by afternoon. While not yet triggering "Extreme Heat Warning" closures today, it's hot enough to mess with you if you're not prepared.
Look, the City of Phoenix isn't shutting down Camelback Mountain or Piestewa Peak today like they do when temperatures hit 105°F or higher. Parks and trails are open for regular hours, but city officials are still pushing their "Take a Hike. Do it Right" guidelines. That's code for "don't be an idiot and require a rescue, because our first responders are already dealing with enough."
Environmental Check
The air quality is hovering in the moderate zone. Your lungs will be dealing with a moderate level of PM2.5, which can irritate airways, and the Arizona Department of Environmental Quality (ADEQ) forecasts an Ozone AQI of 77 for today, also in the moderate range. Sensitive groups, you know who you are – asthma, allergies, or just generally grumpy when the air isn't pristine – this is your cue to keep your activity levels dialed down or move it indoors. The rest of us might just feel a bit more winded than usual.
| Hazard | Level | Health Impact |
|---|---|---|
| PM2.5 | Moderate | Inhalable pollutant particles; exposure can cause eye/throat irritation, coughing, or difficulty breathing for sensitive groups. |
| Ozone | Moderate | Can cause breathing difficulties for children, older adults, and persons with respiratory problems. |
| Pollen | Moderate | General allergic reactions possible for sensitive individuals. |
Don't Underestimate the Heat
Even though we're not under a city-mandated trail closure today, 96°F is no joke. The National Weather Service forecast shows us heading into triple digits later in the week. Hydrate like your life depends on it (because it kind of does here), wear lightweight, loose-fitting clothing, and for the love of all that is holy, stick to early mornings or late evenings for your runs or hikes. Seriously, visitors from places like Iowa note that Arizona heat is "a different challenge" – and they're not wrong.
Mind the Construction
If your usual route takes you through downtown Phoenix, be aware that various street restrictions and closures are in effect for utility and transportation work. For instance, 14th Street between Taylor Street and Polk Street is experiencing a full closure today through June 6th. Check the City of Phoenix Traffic Restrictions page before you head out to avoid getting rerouted into an unexpected construction zone. While ADOT isn't planning state highway closures for Memorial Day weekend, local detours are always a pain.
Wildfire Watch (Always)
While there aren't any massive, air-choking wildfires directly impacting Phoenix right now in the last 24 hours, it's always wildfire season in Arizona. The National Interagency Fire Center reports dry conditions across the Southwest and increased fire activity nationwide. A staggering 96% of 2026 Phoenix Dispatch Area wildfires so far have been human-caused. Don't be that guy. Avoid parking on dry grass, ensure your trailer chains aren't dragging, and if you're celebrating Memorial Day outside, make sure your barbecue coals are out cold before you walk away. We've got enough to deal with without someone else's preventable fire adding to the mix.
Data grounded with 12News, AccuWeather, ADEQ, and NWS from May 25, 2026.