Recent National Weather Service forecasts and ensemble models show Austin overnight lows stabilizing in the mid-70s on September 27 under persistent high pressure and light southerly flow, well above seasonal norms but far from the market's bimodal extremes. The near-even split between ≤65°F and ≥84°F outcomes reflects trader emphasis on residual model spread and potential for rapid steering pattern shifts, even as official guidance converges on typical late-September warmth without frontal influence until midweek. This uncertainty premium in the market-implied odds highlights how small forecast revisions in temperature or wind could swing resolution between the 70–77°F bands favored by current data.