**Trader consensus centers on a 25°C daily minimum for Hong Kong on August 4, 2026, with 65% implied probability, followed by 26°C at 27.5%.** This reflects current official guidance from the Hong Kong Observatory showing a forecast range of 25–30°C under mainly cloudy skies with showers and a southeasterly flow. Persistent broad troughs of low pressure over the South China Sea and an active southerly airstream are maintaining high humidity (70–95%) and cloud cover, which limits nighttime radiative cooling and supports minimum temperatures near or slightly below the August climatological average of ~26–27°C. Seasonal outlooks indicate normal to above-normal temperatures overall, consistent with long-term warming trends, while no cold fronts, typhoon influences, or major model shifts are altering the near-term pattern. Recent observations and short-range forecasts align with these conditions persisting into early August, with similar minima reported or projected for adjacent days. The market distribution—favoring 25°C over both warmer and cooler outcomes—captures the narrow uncertainty band typical of humid subtropical summer nights, where small variations in cloud thickness or shower timing can shift the low by 1°C. Updated HKO guidance or model runs in the next 24–48 hours represent the primary near-term catalysts that could adjust these probabilities.