Current National Weather Service and ensemble model guidance indicates a mid- to upper-70s overnight low for Austin on September 2, driven by persistent southerly flow, moderate humidity, and partly cloudy skies that limit radiative cooling. With only 48 hours until the minimum occurs, small shifts in cloud cover, wind speed, or any evening convection could easily move the outcome several degrees. Historical climatology shows an average low near 71 °F, yet recent Septembers have trended warmer; traders therefore assign roughly equal implied probability across bins centered on the forecast range while awaiting the next model update and official NWS point forecast.