Recent National Weather Service and model guidance for San Francisco on August 30, 2026, points to a daily minimum temperature in the mid-50s °F, consistent with the long-term average low of 56 °F for the date and the persistent marine layer influence. Onshore westerly flow and coastal stratus are expected to limit radiational cooling overnight, keeping the low near 54–56 °F under partly cloudy skies, while typical August variability in marine-layer depth and wind speeds can shift the exact minimum by several degrees. With the event only two days away, updated NHC-adjacent regional model runs and local observations will refine the forecast, but current conditions favor values clustered around the historical baseline rather than extremes. Trader consensus reflects this narrow scientific window, with probabilities spread across mid-range bins amid acknowledged uncertainty in short-term boundary-layer processes.