Marine layer depth and persistent onshore flow from the Pacific dominate Los Angeles maximum temperatures on July 13, with National Weather Service guidance indicating a moderate inversion likely capping official station readings near 74–77°F. Recent model consensus favors this range at key reporting sites, aligning with the market’s near-even split between the 74–75°F (34.5%) and 76–77°F (34.0%) brackets. Subtle differences in low-level moisture, wind direction, and marine layer persistence introduce the main uncertainty, as a stronger layer would suppress readings by 1–2°F while modest weakening allows marginal warming to the upper 70s. Updated NWS afternoon forecasts and station observations will resolve the outcome.