Persistent summer heat across Central Texas, driven by a strong upper-level ridge and southerly flow, keeps Austin overnight lows centered in the mid-70s°F range typical for late August. Official guidance from the National Weather Service and model consensus project minimum temperatures between 70–78°F on August 22, with the spread reflecting uncertainty in cloud cover, wind speed, and localized radiational cooling under mostly clear skies. Historical climatology shows average August lows near 75°F, and the current heatwave pattern—with daily highs often exceeding 100°F—has produced similar minima in recent days without significant frontal passages. Trader sentiment clusters around the 70–79°F bins because small forecast shifts in dew points or boundary-layer mixing can easily move the observed low by a degree or two, while extremes remain low-probability absent an unexpected disturbance. Updated model runs and evening observations will refine resolution criteria ahead of market close.