**Forecast models and current conditions point to a minimum temperature near 26–27°C for Shanghai on August 25, supporting the market's heaviest positioning on those outcomes.** As of August 23, official and ensemble guidance (including GFS, ECMWF-influenced sources, and local monitoring) consistently project overnight lows of 25–27°C under partly cloudy skies, light southeasterly flow, and modest humidity, with only isolated light rain possible. This range aligns with late-August climatology for the region (typical August lows near 24–26°C) and reflects the absence of any strong cold advection or clearing that would allow greater radiational cooling. Recent observations show persistent warmth, with recent nighttime minima holding in the mid-to-upper 20s amid cloud cover and urban heat retention; no major synoptic shift is expected before the 25th. Higher outcomes (28°C+) remain less favored due to the typical pre-dawn cooling window, while sub-25°C readings would require clearer, calmer conditions not currently indicated. Traders appear to be weighting the tight model consensus around 26–27°C, with implied probabilities reflecting the narrow uncertainty band typical of short-range temperature forecasts this close to the event. Updated model runs and official China Meteorological Administration briefings in the next 24–48 hours represent the primary near-term catalysts for any adjustment.