Alright, San Antonio, if you're hitting the pavement today, you're either a glutton for punishment or you're about to find out exactly what "moderate" means for your lungs and knees.
Why today is/isn't the day
- Air Quality is Meh: We're sitting at an AQI of 95, with PM2.5 as the dominant pollutant. That's on the higher end of "Moderate," folks. If your respiratory system usually complains, today's its day to shine with extra irritation.
- Pollen's Doing Its Thing: Moderate pollen levels mean your nose and eyes might decide to join the PM2.5 party and make your outdoor excursion an all-inclusive allergy fest.
- Wet, Muddy, and Closed Trails: Remember all that rain we've had? Bexar County has seen 2 to 5 inches over the past week. Well, the trails are still paying for it. Expect mud, debris, and standing water. Some spots, like Camino Coahuiteca and River Front Parkway, are straight-up closed due to high water. Don't be that person trying to ford a creek; it's not a badge of honor, it's a trip to urgent care.
The Local Lowdown
It's Memorial Day, so you might think the trails would be clear, but that's just wishful thinking in San Antonio. If you were planning on tackling the Salado Creek Greenway around the Tobin Park Trailhead, be aware that TXDOT construction is causing intermittent closures. And if you're further south, the section from Gembler Road to Houston Street on the Salado Creek Greenway is closed until winter 2026. Yeah, winter 2026. Plan accordingly, or enjoy your detour through suburban traffic.
Over at Government Canyon Natural Area, there's a Memorial Day Hike happening this morning. If you're joining, remember it's 7-9 miles of uneven terrain. Don't show up unprepared and expect a stroll in the park.
Trail Closures & Flood Risk!
Seriously, folks, the rain has left its mark. Camino Coahuiteca and River Front Parkway are closed due to high water until further notice. And that's just what's officially closed. Assume any low-water crossings are sketch, muddy, or outright impassable. Turn around, don't drown or break an ankle.
Air Quality & Allergy Alert
An AQI of 95 (PM2.5 dominant) means sensitive groups might experience symptoms. Combine that with moderate pollen, and you've got a recipe for wheezing and sneezing. If you've got asthma or bad allergies, consider keeping it indoors today, or at least take your meds and bring a buffer.
Stay Smart Out There
Even with the overcast skies and cooler temps (around 21.7°C or 71°F), humidity is usually a factor this time of year. Drink plenty of water before you head out, and carry more than you think you'll need. Tell someone where you're going, especially if you're venturing onto those potentially muddy trails. And for the love of all that is holy, watch your footing. Mud-induced face plants are not a good look.
Data grounded with Express-News, City of San Antonio, TCEQ, and NWS from May 24-25, 2026.