National Weather Service forecasts for San Francisco on October 12 project an overnight low near 52°F under mostly clear skies, light variable winds, and high pressure favoring radiational cooling, aligning closely with the seasonal average of 54.9°F. These conditions, with minimal marine layer influence or fog, support trader consensus around the 46–61°F ranges while capping odds for extremes below 44°F or above 62°F. Recent model runs show limited spread, though slight revisions in wind or cloud cover could shift the minimum by a few degrees before the official observation window closes. Historical analogs confirm such mild October nights are typical absent stronger onshore flow.