Todays weather in Houston Texas - Wednesday - 13 May 2026

(00:00:00) Todays weather in Houston Texas - Wednesday - 13 May 2026 (00:00:37) Who Should Limit Outdoor Time (00:01:22) Dress and Commute Wednesday (00:02:06) Late-Week Humidity Surge (00:02:46) Weekend Rain Timing and Uncertainty (00:03:20) Key Signals to Watch Houston is under an Ozone Action Day alert today, May 13th, and if you spend time outdoors this afternoon, the details matter. Clear skies and a high of 91 degrees combined with moderate southeasterly winds are driving ground-level ozone higher through the day — the kind of invisible air quality risk that's easy to underestimate because the sky looks perfectly fine.Sensitive groups — children, older adults, and anyone with asthma or a respiratory condition — should limit strenuous outdoor activity, especially between midday and the evening commute. If you can move a workout indoors today, do it. For everyone else, normal activity is manageable, but extended afternoon exertion in direct sun is worth reconsidering. Ozone builds through the heat of the day, so morning hours carry the lowest risk.On the practical side, conditions are otherwise straightforward: dry roads, no precipitation, no fog. Light breathable clothing, sunscreen, and hydration cover the basics. Humidity is relatively comfortable mid-week — enjoy it, because that changes.Starting Thursday and into Friday, Gulf Coast humidity begins pushing in. By the weekend, Houston shifts from mid-week comfort to genuine summer mugginess, and rain chances increase as coastal moisture arrives. Weekend shower timing is still uncertain, so keep plans flexible but don't cancel anything yet — Friday will bring a clearer picture.Two things to watch: how air quality develops this afternoon, and weekend rain timing as Friday's forecast sharpens. Mid-week is your window for outdoor plans before the humidity surge takes hold.This episode includes AI-generated content.