Trader sentiment clusters tightly around 32–33 °C because short-range guidance from Singapore’s Meteorological Service and regional models shows typical early-May inter-monsoon conditions, with moderate diurnal heating offset by afternoon convection. Widespread thundery showers expected across the island on the 18th are likely to limit peak temperatures near 32 °C at most observing stations, giving that outcome its narrow lead, while clearer slots or delayed rain could allow a few sites to reach 33 °C. The close 32.5 %–26.5 % split reflects genuine uncertainty in the timing and coverage of the equatorial rain band, rather than any broader climate signal; ENSO-neutral conditions persist through May and exert little influence on this single-day outcome.