National Weather Service forecasts and ensemble model consensus have locked in a daily maximum of 68–69°F at Los Angeles International Airport for May 15, producing the near-certain market-implied odds for that narrow band. Persistent onshore flow and a well-established marine layer have capped afternoon heating by maintaining stable stratification and limiting vertical mixing, a pattern reinforced by cooler sea-surface temperatures observed in recent satellite and buoy data. This setup aligns with typical May coastal climatology, where average highs near the shoreline rarely exceed 72°F. Only a late-day shift to stronger offshore winds or unexpectedly delayed stratus clearance could push readings into the 70°F range, outcomes the latest guidance assigns very low probability. Resolution rests on the official end-of-day reading at the primary station.