**Trader sentiment for the lowest temperature in San Francisco on September 10 centers on the 62–63°F range (51.5% implied probability), followed by 64–65°F (27.5%), reflecting current forecast consensus for overnight lows in the low-to-mid 60s°F.** National Weather Service guidance and supporting models show Thursday night (September 10) lows near 61–63°F under partly cloudy skies, with light winds and no strong marine layer push. This aligns with the observed pattern of moderated coastal temperatures driven by the Pacific Ocean’s thermal inertia, which limits radiational cooling compared to inland areas. Historical averages for the date place the normal low at 56°F (1991–2020 normals), but recent Septembers have trended warmer, with 2025 recording 61°F and several prior years in the upper 50s. Key variables include the strength of onshore flow, cloud cover reducing nighttime heat loss, and any residual warmth from the preceding day’s high (forecast near 75°F). Clearer skies or lighter winds could allow slightly lower readings, while increased marine influence would keep lows elevated. No major atmospheric shifts, such as strong offshore winds or anomalous sea-surface temperatures, appear in the latest model runs, supporting the market’s concentration around 62–65°F as the most probable outcome ahead of final overnight observations.