Trader consensus on Polymarket reflects tight uncertainty in short-range forecasts for Guangzhou's highest temperature on April 17, with implied probabilities clustered around 26–30°C as local meteorological models from the Guangzhou Observatory project a 27°C high amid cloudy skies and thunderstorms, while AccuWeather aligns at 81°F (27°C) with 95% precipitation odds. Recent developments, including a 95% humidity reading and ongoing frontal activity suppressing solar insolation, have cooled expectations from earlier 29–30°C projections for April 15–16, consistent with April climatology averaging 26°C highs and frequent convective showers. Key differentiators include thunderstorm timing and cloud persistence; new China Meteorological Administration updates expected April 16 could refine the outlook as resolution nears.