Recent National Weather Service forecasts and supporting model consensus indicate a daily minimum temperature in the low 50s°F for San Francisco on October 13, driven by clear skies, light winds, and radiational cooling under a stable high-pressure ridge with typical marine layer moderation. This positions the 50-51°F range as the dominant market-implied outcome, reflecting trader assessment of official guidance showing overnight lows near 51°F at coastal stations. Historical October climatology for the city, with average minima around 52°F, further supports limited downside risk to sub-48°F readings absent unexpected cold-air intrusions, while warmer thresholds remain improbable given the absence of offshore flow or anomalous warming. Updated model runs and real-time observations through the morning hours will refine resolution criteria tied to official thermometer readings.