Trader consensus on Polymarket assigns virtually 100% implied probability to 28°C as Beijing's highest temperature on April 30, driven by China Meteorological Administration forecasts and real-time observations confirming daytime peaks at that level amid clear skies and light southerly winds. Current readings from official stations hovered around 27–28°C in the afternoon, aligning with model consensus for moderate spring warming influenced by high-pressure systems and typical late-April solar insolation, well below historical extremes like 33°C. This positioning reflects low uncertainty as the sun sets, with resolution hinging on final evening data. A challenge would need an unforeseen late-afternoon heat burst from adiabatic compression or measurement revisions, though meteorological conditions preclude significant escalation.