**Forecast models from official sources like the Shenzhen Meteorological Bureau and international providers point to a nighttime low near 26–27°C on September 7, driven by persistent subtropical high pressure, light variable winds, and scattered showers that limit radiative cooling overnight.** High humidity (80–90%) and cloud cover from the East Asian monsoon pattern keep minimums from dropping further, consistent with early-September climatology where average lows range 24–27°C. Minor model differences in shower timing and clearing skies create the tight clustering around 26°C and 27°C, while the 32°C-or-higher outcome reflects uncertainty if daytime heat lingers unusually into the night. No major tropical systems or cold-air intrusions are expected to shift the pattern before resolution. Traders appear to weigh the latest hourly guidance and ensemble spreads most heavily, with the narrow spread among leading outcomes highlighting genuine forecast uncertainty in boundary-layer conditions.