**Current National Weather Service and private forecast models indicate a daily minimum temperature for Los Angeles on September 13 near 67–68 °F, driven by a persistent marine layer and moderate onshore flow that limits overnight cooling.** Typical September conditions feature morning low clouds and fog along the coast that suppress radiative cooling while keeping daytime highs in the upper 70s to mid-80s. This pattern, reinforced by light southwesterly winds and a stable upper-level trough, has produced below-normal highs through mid-month with overnight lows holding in the mid-to-upper 60s rather than dropping toward the climatological average of 64 °F. Model consensus shows little disagreement on the overnight minimum, though small variations in marine-layer depth or wind timing could shift the exact low by a degree or two. Historical records note that September 13 lows have ranged from the mid-50s in anomalous cool outbreaks to the low 70s during strong offshore events, but the current setup lacks the offshore flow or clear-sky conditions needed for extremes. Traders are therefore concentrating probability on the 68–69 °F bin while assigning meaningful weight to both warmer (limited cooling) and cooler (stronger marine influence) outcomes, reflecting the narrow but real uncertainty inherent in the final hours before the daily minimum is recorded.