Recent forecasts from agencies including the UK Met Office point to a July 4 maximum near 31°C in Guangzhou, aligning with the market’s clustered probabilities around 30–32°C. In this subtropical monsoon regime, peak temperatures hinge on insolation, boundary-layer moisture, and convective cloud cover that can cap daytime highs through evaporative cooling and reduced solar input. Early July climatology features average highs of 32–33°C amid 80%+ relative humidity, yet scattered thunderstorms—common in the region—introduce variability that differentiates 29°C from 33°C+ outcomes. With resolution hinging on official station readings, traders weigh short-term model consensus against typical afternoon shower timing and any lingering frontal influences.