If you absolutely have to get out there today, Houston, go early. Otherwise, maybe just hit the treadmill.
- Air Quality is Sketchy: AQI is moderate at 79, but remember that Houston is under an Ozone Action Day until this evening. That means conditions are ripe for ozone to cook up, especially later in the day when the sun really gets going. Your lungs might not appreciate a long, hard effort. Sensitive groups, you're better off indoors.
- Pollen's Doing Its Thing: Moderate pollen levels mean you'll be sniffling and sneezing through your run if allergies hit you hard. Keep those meds handy.
- Construction Continues to Annoy: Persistent trail closures, particularly around major bayous, mean your usual routes might be rerouted or blocked entirely. Check before you head out.
Today's Pollen Breakdown
| Pollen Type | Level |
|---|---|
| Overall | Moderate |
The Rundown for Monday, May 25, 2026
Alright, Houston, let's talk about hitting the pavement or trails today. We're looking at a "Mainly Clear" sky with temperatures hovering around a balmy 28.2°C (that's about 83°F for the Fahrenheit crowd). The humidity, currently a swampy 91%, is supposed to drop a bit as the day progresses, but it'll still feel pretty sticky out there. Good news is, the widespread flooding from Saturday's downpours has mostly cleared up, so you're unlikely to be swimming your intervals.
However, clear skies and rising temperatures aren't always your friends in our city. We're under an Air Quality Alert for an Ozone Action Day until 6:30 PM this evening for both coastal and inland Harris County. This means there are atmospheric conditions perfect for ground-level ozone to build up. While the general AQI might be sitting at a moderate 79 with PM2.5 as the dominant pollutant, localized areas, like around Memorial Park, have seen AQI values push into the "Poor" category, even hitting 106. That's enough to give anyone, especially those with respiratory issues, a good cough.
Ozone Alert: Head Out Early or Stay Indoors. With an Ozone Action Day in effect, pollution tends to worsen in the afternoon heat. If you're set on an outdoor workout, get it done before lunch. Otherwise, consider an indoor option to spare your lungs.
Then there's the usual Houston headache: construction. It’s a permanent fixture here, isn't it? If your go-to is the Buffalo Bayou Park trails, especially the sections east of downtown, be aware that some segments are still closed for ongoing improvements. Similar story for parts of the Brays Bayou Trail, which is closed at Spur 5 due to the never-ending SH 35 expansion. And don't even get me started on the White Oak Bayou Greenway (Little White Oak Bayou Trail) between Houston Avenue and the Castillo Community Center, which is completely out of commission through 2028 for IH-45/I-10 connector ramp work. Always check your route before you lace up, or you'll find yourself doing unplanned detours through traffic, which is a whole other kind of hazard.
Hydration is Key (and Obvious): Even if it doesn't feel like "extreme" heat, 83°F with Houston humidity is more than enough to dehydrate you quickly. Drink plenty of water before, during, and after your workout. Don't be a hero.
So, today's a day for smart choices. If you're feeling a bit stuffy from the moderate pollen or have any lung sensitivity, hitting the gym might be a better call. If you're determined to run outside, keep it shorter, less intense, and hydrate like it's your job. And for the love of all that is holy, watch out for construction detours.
Data grounded with AccuWeather, Click2Houston, Filterbuy, FOX 26 Houston, Houston Bike Guide, Houston TranStar, Kleenex US, NWS Houston/Galveston, Space City Weather, Weather Underground from May 25, 2026.