**Trader sentiment centers on the interplay between San Francisco’s persistent marine layer and modest warming from a weak upper-level ridge.** National Weather Service and local forecasts indicate a daytime high near 72–74°F on August 6 under partly sunny to mostly sunny skies, with the marine layer keeping coastal areas from exceeding typical August norms around 70°F. Westerly winds and possible afternoon clearing introduce uncertainty between the 70–71°F and 72–73°F bins, which together command roughly 75% of market-implied probability. Higher outcomes (74–75°F+) remain possible only if the marine layer thins substantially or offshore flow strengthens, while lower bins reflect the risk of lingering fog. These closely matched leading probabilities capture genuine forecast variability in exact maximum temperature, consistent with historical coastal cooling patterns and current model consensus.