Persistent June gloom marine layer and onshore flow are the main drivers keeping Los Angeles coastal highs tightly contested between the 70-71°F and 72-73°F bins at 47.5% and 45.5% implied probability. National Weather Service and model guidance show the inversion layer limiting afternoon warming at LAX, with sea-breeze timing and any late-day clearing creating the narrow spread; climatological June averages near 75°F provide context but current conditions favor the lower end. Minor upward shifts in 74-75°F odds reflect any weakening of the marine influence in updated runs, while lower bins remain sidelined absent stronger cooling. Traders monitor the next NWS forecast discussion and real-time observations for resolution by evening.