**Persistent cloud cover, widespread rain, and high humidity from the remnants of Typhoon Shadell (or associated circulation) are keeping overnight radiative cooling limited in Shenzhen, anchoring the August 30 minimum near 25–26 °C.** Official and model guidance (including local meteorological services and international forecasts) show mostly cloudy to overcast skies with thunderstorms or periods of moderate-to-heavy rain expected through the night of the 29th into the 30th. Light easterly or variable winds (generally under 10 km/h) and dew points near or above 25 °C further suppress temperature drops. Historical August climatology for Shenzhen places the average low around 25 °C, and the current pattern aligns closely with that baseline rather than allowing clearer-sky cooling toward 23 °C or below. Model consensus and recent updates show little spread in the overnight minimum, which explains why market-implied odds cluster tightly between 25 °C (48 %) and 26 °C (49 %), with 27 °C a more distant third. Any last-minute clearing or heavier localized rainfall could nudge the exact reading by 1 °C, but the dominant factors point to minimal overnight variation.