Recent National Weather Service and AccuWeather guidance points to a daily high near 70–72°F for San Francisco on August 16, with the marine layer and moderate onshore flow limiting afternoon warming. Persistent stratus clouds and sea breezes reduce insolation and cap temperatures below the 73°F August normal at SFO, favoring the closely matched 70–71°F and 72–73°F outcomes that together exceed 69% implied probability. Minor model spreads around inversion strength and fog clearance timing create the narrow gap between these bins, while cooler or warmer extremes remain low-probability given stable synoptic conditions and no anomalous heat signals. Updated short-range runs and observations near midday will further refine trader positioning ahead of official verification.