Recent ensemble forecasts for Shanghai point to overnight lows of 27–29°C on August 7 amid the East Asian summer monsoon, where elevated humidity and frequent cloud cover limit radiative cooling. Typical August minima average near 25–26°C, but current model guidance highlights modest warming from southeasterly flow and scattered convective activity that could raise the floor. The near-even market-implied odds across 27–29°C reflect traders weighing these variables against short-term model spread, with resolution hinging on official minimum readings from local stations. Updated runs from agencies like the China Meteorological Administration over the next 48 hours may shift sentiment.