Official National Weather Service forecasts for San Francisco on August 2, 2026, call for a high near 77–78°F under sunny conditions following morning haze, consistent with the market’s concentration of probability in the 74–79°F range. A gradual warming trend through the weekend, driven by a flattening upper-level ridge and reduced marine-layer influence, supports these outcomes amid typical summer onshore flow that moderates coastal temperatures. Historical August averages near 70°F provide context, while model consensus and the proximity of resolution limit upside risk beyond 80°F. Traders appear to weigh the current forecast guidance and limited day-to-day variability against the possibility of minor adjustments in the final model runs before the daily maximum is recorded at the official station.