Trader consensus on Polymarket heavily favors highs of 19–21°C for Beijing on March 24, driven by converging forecasts from ECMWF and GFS models predicting a mild spring day with highs clustering around 20°C amid weak southerly winds and partial cloud cover. Recent model updates show reduced uncertainty after earlier runs hinted at cooler 17–18°C outcomes under potential northern air masses, but incoming warm advection has boosted warmer odds. Differentiating factors include variable cloudiness impacting solar insolation—clearer skies favor 21°C+ via enhanced daytime heating—versus lingering stratiform clouds capping at 19°C, against Beijing's late-March climatology of 15–18°C averages influenced by urban heat island effects and early-season variability. Key watch: afternoon observations from China Meteorological Administration.