Official forecasts from Singapore’s Meteorological Service indicate daily maximum temperatures of 33–34°C for most of the remainder of May under prevailing inter-monsoon conditions with light, variable winds. Afternoon thundery showers, driven by daytime heating and high moisture content, frequently limit peak readings by increasing cloud cover and triggering convective cooling before the warmest hours. Recent observations show maxima occasionally reaching 35°C when showers are delayed or localized, while stronger convection can hold readings near 31–32°C. Model consensus and historical May climatology around 31–32°C support the market’s tight clustering between 31°C and 33°C outcomes, with any shift in shower timing or intensity on May 18 likely to determine whether the highest station reading exceeds or falls short of 32°C.