Forecast models from the National Weather Service and other agencies indicate a highest temperature in San Francisco on August 14 most likely in the upper 60s°F, aligning with the closely matched market-implied odds for 68-69°F and 66-67°F. Persistent onshore flow and the marine layer, reinforced by cooler Pacific waters, moderate afternoon highs along the coast while limiting inland heat advection. Typical mid-August climatology supports daily maxima near 68-70°F under partly cloudy to overcast conditions, with minimal day-to-day variability expected absent a strong offshore shift. Key resolution hinges on precise maximum readings at official stations, where even small changes in cloud cover or wind could distinguish between adjacent bins. Updated model runs and observations through the morning will provide the final data points for traders.