Persistent high pressure and southerly flow across Southeast Texas are sustaining elevated dew points and limiting nocturnal radiative cooling, anchoring forecast overnight lows for Houston on August 25 near 80°F according to National Weather Service guidance. Typical late-August climatology features minimums around 77°F, with rare drops below 72°F absent a frontal passage, which none is expected before the date. Model consensus shows only modest day-to-day variability from humidity and light winds rather than major shifts, producing the tightly bunched market-implied odds across the 74–83°F range. Any late adjustment in steering patterns or increased cloud cover could nudge the actual low a degree or two in either direction before resolution.