Forecast models from agencies tracking the region show Shenzhen’s October 3 high centering on 29–30 °C as a mid-latitude frontal system brings rain that eases by midday, allowing modest afternoon warming under partly cloudy skies. Recent days featured 33 °C peaks before the current cool-down and elevated humidity, which limits radiative heating and caps the daily maximum near historical early-October averages of 28–29 °C. Light easterly winds and lingering cloud cover further suppress extreme readings, while any earlier clearing could push the peak toward 31 °C; traders therefore cluster probability on the narrow 29–30 °C band with lower odds assigned to outliers above 33 °C or below 28 °C.