Recent forecasts from multiple meteorological sources, including local Chinese weather services and international models, point to a highest temperature in Shanghai on September 13 near 29–30°C under partly cloudy to overcast skies with light northeast winds. This aligns with the seasonal decline in highs from late-summer peaks, as the region transitions toward autumn under stable atmospheric conditions without strong frontal systems or typhoon influences. Model consensus shows minimal day-to-day variability, keeping extremes like 32°C or below 28°C unlikely given current pressure patterns and humidity levels around 60–80%. The market’s heavy weighting toward 29°C reflects trader assessment of these near-term model outputs, with 30°C as a close secondary outcome if daytime heating exceeds expectations. Updated runs from agencies like the China Meteorological Administration in the next 24–48 hours could shift probabilities if cloud cover or wind shifts alter peak readings.