Recent National Weather Service and NOAA model consensus points to a persistent marine layer and onshore flow over Southern California, moderating daytime heating and favoring a Los Angeles high temperature on May 18 in the 68–72°F range. This pattern—common during the transition to summer—advects cool, moist air from the Pacific, limiting solar insolation and holding peaks near or slightly below the climatological May average of 74°F. Recent days have shown similar suppression, with observed highs of 66–69°F amid stratus clouds and 10–15 knot westerly winds. Ensemble guidance shows limited spread, though subtle shifts in upper-level ridging or marine layer depth could nudge the outcome toward the 70–71°F or 72–73°F bins. Resolution hinges on official Los Angeles International Airport readings, with the next 48-hour forecast updates serving as the primary near-term catalysts for market movement.