Todays weather in Houston Texas · 13 May 2026 · 4 min

Todays weather in Houston Texas - Wednesday - 13 May 2026

An Ozone Action Day is in effect for Houston today with a high of 91°F — here's who should limit outdoor time and when. Plus, a late-week humidity surge and weekend rain are on the way.

Todays weather in Houston Texas
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Todays weather in Houston Texas - Wednesday - 13 May 2026

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What's covered

Ozone Alert Houston Today

An Ozone Action Day is in effect for Houston right now, and if you're planning to be outside for any length of time today, that changes your plan. Today is May thirteenth, and the conditions are almost textbook for poor air quality.

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Who Should Limit Outdoor Time

Here's what matters for today. If you fall into a sensitive group, that means children, older adults, anyone with asthma or respiratory conditions, the guidance is clear.

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Dress and Commute Wednesday

On the practical side, today's conditions are otherwise fairly manageable. Ninety-one degrees with clear skies means direct sun exposure is the main issue.

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Late-Week Humidity Surge

The bigger shift comes later this week. Humidity is confirmed to start rising by Thursday and Friday.

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Weekend Rain Timing and Uncertainty

Rain returns to Houston by the weekend. That's the current picture, and it's a meaningful shift after a dry stretch.

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Key Signals to Watch

The two things worth tracking from here: first, how the air quality situation develops through this afternoon, particularly if you or someone in your household is in a sensitive group. Second, the weekend rain timing as we get closer to Friday and more precise forecast data becomes available.

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