Current short-range forecast models indicate Shanghai's overnight low on August 15 will most likely settle near 26°C, driven by persistent subtropical high pressure, elevated humidity, and urban heat retention that limit radiative cooling. Recent observations show typical mid-August patterns with daytime highs of 31–32°C and minimal frontal activity, keeping minimums above seasonal baselines around 25°C. Ensemble guidance shows low spread for extreme deviations, though scattered showers or slight wind shifts could nudge readings 1°C lower or higher. Traders assign highest implied probability to 26°C because these conditions align closely with official guidance and climatological norms for the region, with updates from regional meteorological centers expected to refine the outlook over the next 48 hours.