Official forecasts from the National Weather Service show Austin overnight lows holding in the upper 70s on August 28 under a strong high-pressure ridge, with clear to mostly clear skies, light southeast winds, and dew points near 70°F limiting radiative cooling. This setup aligns with late-summer climatology where urban heat retention and high humidity keep minimums elevated above the long-term average of roughly 74°F. Numerical models show only modest spread in the exact low, concentrating market-implied odds on the 72–79°F bins while lower probabilities on extremes reflect low rain chances and stable steering flow. Updated model runs and any late-day cloud or wind shifts remain key variables before final observations.