**Forecast consensus centers on a minimum near the seasonal average of 56°F, with marine influences and model outputs pinning the likely range in the mid-to-upper 50s.** Onshore westerly flow and a moderate marine layer are expected to prevent significant overnight cooling or warming, keeping the low close to the long-term September 5 average of 56.1°F recorded at downtown stations. Recent NWS and private model guidance (including WindBorne and local forecasts) consistently project a low of 56–57°F under partly cloudy skies and light-to-moderate west winds, with minimal model spread. Trader positioning reflects this tight clustering: the 56–57°F and 58–59°F bins dominate at 40.5% and 38.5% implied probability because they align directly with the most probable outcomes from official guidance, while the elevated 47°F-or-below price (37.5%) likely captures residual tail risk from forecast uncertainty or station-specific microclimates rather than current data. Historical records show lows below 52°F on this date are rare (last near 50°F in 1999), reinforcing the market’s focus on the narrow band around the baseline. No major synoptic shifts—such as a strong offshore flow or unusual fog patterns—are anticipated before resolution, so updates to the evening model runs or real-time observations will be the key near-term drivers.