Recent ensemble forecasts from major models converge on daytime maxima of 29–31°C in Guangzhou on June 16 amid moderate rain and persistent cloud cover from the East Asian monsoon. High boundary-layer humidity and scattered afternoon convection limit peak insolation, keeping temperatures near the June climatological average of about 31°C while suppressing extremes above 32°C. Official guidance from Chinese meteorological agencies aligns with this range, producing the tightly clustered market-implied probabilities across 29–32°C outcomes. Traders weigh the timing of heaviest showers and any late clearing that could allow brief warming, though overall model agreement keeps odds distributed rather than concentrated.