Recent forecasts from the National Weather Service place San Francisco’s overnight low for September 2 near 58 °F under partly cloudy skies and moderate southwest flow. This places the outcome near the long-term average of 56 °F while remaining well above the September record low of 50 °F. Trader sentiment is balanced across the 50–61 °F bins because small differences in marine-layer depth, stratus coverage, and radiative cooling under the inversion can shift the minimum by several degrees. A stronger onshore push or thicker low clouds would limit cooling and favor the upper bins, whereas clearer breaks or lighter winds could allow readings to dip into the mid-50s. With resolution less than 24 hours away, the next model update and local observations will determine which narrow range captures the night’s actual minimum.