**Forecast models from agencies like the China Meteorological Administration and international ensembles have converged on a daily maximum of exactly 31°C for Shanghai on September 25, 2026, under partly cloudy conditions with southerly flow and moderate humidity.** Current observations in the late afternoon show temperatures near 28–29°C with minimal precipitation risk, aligning with climatological norms for late September where highs typically range 27–30°C. This strong consensus across numerical weather prediction runs underpins the market's near-certain 31°C outcome. A sudden increase in cloud cover or localized convective activity could cap the peak below this threshold, though model agreement makes such deviations improbable before resolution.