Latest GFS and ECMWF ensemble forecasts project Los Angeles highs clustered between 68-76°F on April 5 under weak high pressure and moderate onshore flow, fueling tight market-implied odds across 72-79°F bins as traders weigh marine layer persistence. The marine stratus clouds typical of coastal Southern California in early April may delay burn-off, capping peak temperatures via reduced insolation and enhanced sea breeze cooling, with model spread reflecting uncertainty in boundary layer mixing and stratus dissipation timing. Historical April averages near 71°F at LAX provide baseline context amid climatological spring variability. New 00Z model runs and NWS updates overnight could sharpen differentiation before resolution via official observations.