Meteorological Service Singapore's latest forecasts for May 15 indicate persistent thundery showers and widespread cloud cover across the island, sharply limiting solar insolation and capping the daily maximum temperature at around 29°C, driving the 91% trader consensus on this outcome. Current observations from key stations like Tuas South and Changi show highs so far in the upper 20s°C amid relative humidity over 85% and accumulated rainfall exceeding 80 mm in some areas, conditions typical of inter-monsoon periods that suppress tropical heating below May's climatological average of 31.5°C. Model consensus from numerical weather prediction systems aligns on these mild parameters, with southwest winds sustaining moisture inflow. Realistic challenges include afternoon cloud breaks enabling brief convective clearing and rapid warming to 30°C or higher, though low-level shear and persistent instability make this unlikely; end-of-day station reports from MSS will finalize resolution.