**Persistent high pressure combined with lingering moisture from former Hurricane Marie produced an exceptionally warm overnight period across the Los Angeles basin on September 9, 2026, driving the official minimum temperature to 77°F at both Los Angeles International Airport and downtown stations.** National Weather Service observations recorded this value as the daily low—12–13°F above the 1991–2020 normal of 64–65°F—following daytime highs that reached 99–105°F. The combination of elevated dew points in the mid-60s to mid-70s and limited nocturnal radiative cooling under clear to mostly clear skies prevented temperatures from falling further. Market-implied odds heavily favor the 76–77°F bin because these verified measurements align precisely with that range, with only remote possibilities of post-hoc station adjustments or alternative resolution criteria altering the outcome.