Alright, San Antonio. Hope you slept well, because the weather out there is playing its usual summer game of "will it rain, won't it rain?" today.
- Expect scattered thunderstorms throughout the day, with a decent 40% chance of getting caught in a shower. Don't be fooled by any early morning clearing; the skies are shifty.
- Air quality is sitting pretty at a "Good" 40 AQI, but watch out for fine particulate matter (PM2.5) which the forecast says might creep into the lower end of the "Moderate" range later. That's likely thanks to Saharan dust and distant wildfire smoke.
- Don't be surprised by detours or outright closures on some of our favorite trails due to ongoing construction.
Today's San Antonio Trail Breakdown
It's July, so you know what that means: humidity is your constant, clingy companion, and the sun will try its best to bake you, even with cloud cover. Today, we're looking at daytime highs hitting around 87°F, but feeling more like 82°F with that lovely South Texas moisture in the air. Throw in those scattered storms, and you've got a recipe for a soggy, sticky run if you're not careful with your timing.
Thunderstorm Risk: There's a 40% chance of rain today, primarily scattered thunderstorms. Keep an eye on the sky and local radar. Getting caught in a downpour isn't just uncomfortable; lightning is no joke.
Greenways and Parks: Mind the Closures
If your usual route takes you along the Leon Creek Greenway, be aware that a significant portion north of the Valero Trailhead, near Loop 1604, is currently closed for TxDOT construction. This isn't a quick fix, folks; it's expected to last until mid-2027. So, if that's your jam, you'll need to find an alternate section or reroute completely. Same goes for parts of the Salado Creek Greenway near the Tobin Park Trailhead, which will see intermittent closures for more TXDOT shenanigans. Always a good idea to check the City of San Antonio's park and trail closure page before you head out, unless you enjoy running into a fence.
Local Event Alert: The SARR Fall Off-RoadRunners Training Program kicks off today, so expect increased activity on trails at spots like Eisenhower Park and McAllister Park, especially early this morning. Share the trails, people. Also, rockFit is holding a fun run and classes at Frost Plaza at The Rock at La Cantera today.
Air Quality & Allergens
The good news is our Air Quality Index is currently sitting at a respectable 40, which is "Good." However, the Texas Commission on Environmental Quality (TCEQ) forecast suggests that PM2.5 levels could push us into the "Moderate" range today. This is primarily due to lingering smoke from agricultural burning in Mexico and wildfires out west, along with a bit of Saharan dust. If you're sensitive, you might feel it.
Pollen Breakdown (July 11, 2026)
| Pollen Type | Level |
|---|---|
| Overall | Moderate |
Hydration is Key: It's San Antonio in July. Even on a "cooler" day with rain chances, heat exhaustion is a real threat. Drink plenty of water before, during, and after your workout. Dress in light, breathable clothing. No, that heavy cotton t-shirt isn't doing you any favors.
Stay smart out there. Your lungs and joints will thank you later.
Data grounded with Google Search from July 11, 2026.