**Trader sentiment for the highest temperature in Los Angeles on September 24 centers on 78–79°F (48.5% implied probability) and 76–77°F (37.5%), with modest weight on 80–81°F (9.5%).** These probabilities reflect expectations for a moderate coastal maximum at the primary observing site, most likely Los Angeles International Airport (LAX). Key scientific drivers include the persistent marine layer—a cool, moist air mass from the Pacific that promotes low clouds and fog, limiting solar heating and capping daytime highs near the coast. Onshore southwest winds of 5–15 mph further moderate temperatures by advecting cooler marine air inland. NWS point forecasts for LAX indicate a high near 81°F under mostly sunny to partly cloudy conditions after morning low clouds, while downtown or inland spots are projected warmer (around 87°F). Historical September averages at LAX hover in the mid-70s, providing context for why traders favor the upper 70s over higher readings. Recent model consensus and updated NWS guidance emphasize limited warming potential today, with no strong offshore flow or clear-sky setup to push readings into the low 80s. As the day progresses, any faster burn-off of stratus could support the small probability mass on 80–81°F, while thicker marine influence would reinforce the 76–79°F range. Market-implied odds aggregate trader assessments of these atmospheric variables ahead of the official daily maximum observation.