Recent National Weather Service and model guidance indicate clear skies over Los Angeles on October 13 following showers on the 12th, favoring strong radiational cooling under light northeast winds and dew points in the upper 40s. This setup supports overnight lows in the low-to-mid 50s°F at official stations, consistent with the 50–55°F bins holding the bulk of market-implied probability. Ensemble spreads remain modest, though subtle differences in boundary-layer mixing and urban heat-island effects create the tight clustering across adjacent temperature ranges. Historical climatology places the October 13 average low near 60°F, so current cooler guidance has shifted trader focus toward the lower bins while leaving room for modest forecast revisions before resolution.