Marine layer strengthening and persistent onshore flow from the Pacific are suppressing daytime heating in the Los Angeles basin ahead of August 13, keeping official National Weather Service guidance centered on a high near 72–78°F under cloudy skies and patchy fog. Recent model consensus shows this cool, stable regime persisting after early-August heat, with marine stratus limiting solar radiation and preventing the typical inland warming that would push readings toward seasonal averages near 85°F. These conditions align with the market’s heavy weighting toward the 74–77°F range as the most probable outcome, while low probabilities on 80°F+ reflect limited upside potential unless the marine layer erodes faster than currently projected. Updated NWS and ensemble forecasts through the next 24–48 hours will be the key data points traders monitor for any shifts.