Recent official forecasts from the Hong Kong Observatory and global models indicate the overnight low on May 19 will likely settle between 24–26 °C under partly cloudy skies with scattered showers. These conditions limit radiative cooling typical of clear subtropical nights while maintaining above-average temperatures consistent with the seasonal outlook for normal-to-above-normal warmth. Historical May minima average 24 °C, with variability driven by wind patterns and cloud cover that can shift the exact low by 1–2 °C. Traders appear to price the close clustering of 24–26 °C outcomes because short-range model consensus remains tight, yet small changes in precipitation timing or wind could nudge the recorded minimum toward either edge of that narrow band before official verification on the 20th.