**Forecast consensus from the National Weather Service and multiple models points to an overnight low in the upper 70s for Houston on August 30, driven by mostly clear skies under a lingering subtropical ridge.** This setup allows moderate radiational cooling overnight, though persistent Gulf moisture and high dew points (near 70–73°F) limit how far temperatures can fall, keeping the daily minimum well above seasonal averages for early fall. Recent conditions reinforce this: August 29 featured highs near 96°F with heat indices over 105°F and only isolated afternoon convection, setting up a similar pattern for the 30th with highs in the mid-90s and minimal overnight wind. Sea-breeze circulation and urban heat island effects in the Houston metro further moderate cooling rates compared to rural areas. The closely matched probabilities across the 72–83°F bins reflect model uncertainty in exact cloud cover, timing of any sea-breeze or weak frontal influences, and localized variations in humidity that can shift the minimum by a few degrees. Warmer outcomes (80–88°F+) gain support if afternoon heating lingers longer or if increased moisture traps heat, while cooler bins remain possible only with unexpected clearer, drier air. Official NHC/NOAA guidance and short-range model runs will be the key updates traders watch as the calendar day begins.