Alright, San Jose, listen up. It's July 11th, and if your plan involves anything more strenuous than reaching for the remote after 9 AM, you better think again.
- The good news: our air quality is stellar today, so your lungs can breathe easy.
- The bad news: it's hotter than a habanero on the asphalt, and that's just a recipe for heatstroke.
- Some downtown routes are choked off for the Obon festival, so don't even think about that "shortcut."
Why Today Is Barely The Day
Today's a classic San Jose summer day, which means clear skies and quickly climbing temps. While the AQI is a sweet 25 – practically pristine for our little slice of Silicon Valley – the mercury is hitting 31°C (that's 88°F for you non-metric types). That's not just "warm," that's "your-knees-will-hate-you-and-you'll-be-chugging-Gatorade-like-it's-water" hot.
We also have moderate pollen, which isn't going to sideline most of you iron-lunged runners, but it's another little scratch against what could otherwise be a perfect day.
Today's Environmental Breakdown
| Pollen Type | Level | Impact |
|---|---|---|
| Overall | Moderate | Allergy sufferers, stay vigilant. |
Extreme Heat Warning: Pace Yourselves, Idiots
Seriously, this heat is no joke. Forecasters are talking about 5 to 10 degrees above normal, pushing into the 90s in our valleys. The City of San Jose's own guidance screams "limit physical activity, avoid 10 a.m. to 3 p.m.". So, if you're hitting the Los Gatos Creek Trail, make it a sunrise mission or wait until the sun dips. Hydrate, wear light colors, and for the love of all that is holy, listen to your body before you end up needing a ride to the ER. This ain't a day to set personal bests, it's a day to survive.
Downtown Detour: Obon Festival Road Closures
If your workout involves pounding the pavement downtown, forget it for a bit. The San Jose Obon Festival means North 5th Street (between Taylor and Empire) and Jackson Street (between North 4th and North 6th) are closed to traffic until midnight on Sunday. Don't plan your long runs through Japantown this weekend unless you enjoy dodging barricades and festival-goers.
Ongoing Trail Construction: West Little Llagas Creek Trail
Heads up, folks in Morgan Hill! The West Little Llagas Creek Trail is currently undergoing creek widening and deepening. That means sections from Watsonville Road to Edes Court are closed, and another segment to Spring Avenue is set to close later this summer. "While there may be periods when no work is occurring... please DO NOT enter the closed trail sections, as they and the surrounding area could be unsafe for the public." You heard the folks at Valley Water. Stick to the open paths or find an alternate route. They're rebuilding, not inviting you for an obstacle course.
No active wildfires are creating smoke problems for us today, which is a minor miracle given how the season's been shaping up across the state, and the San Jose Fire Department has already been busy with vegetation fires this year. But with dry fuels and the risk of monsoonal lightning increasing, keep an eye on those air quality alerts, especially if you're venturing towards the hills in the coming weeks.
Stay safe, stay smart, and for once, maybe just hit the gym's A/C.
Data grounded with KFI AM 640 and City of San Jose from July 11, 2026.