Recent Hong Kong Observatory guidance places the October 3 temperature range at 26–31 °C under an east-to-northeast monsoon flow, with morning showers and thunderstorms expected to limit daytime heating while maintaining high humidity. Traders have assigned the highest implied probabilities to 24 °C and 25 °C minima, reflecting model spreads that allow for greater overnight or pre-dawn cooling if cloud breaks occur or if localized downdrafts from thunderstorms advect slightly cooler boundary-layer air. Persistent overcast conditions generally suppress radiative cooling, yet variable precipitation timing and modest monsoon reinforcement introduce enough uncertainty to keep 24–25 °C competitive against the official baseline. The market will resolve on verified minimum readings from Hong Kong Observatory stations once the full 24-hour period ends.