**Trader sentiment for Singapore’s July 9 maximum temperature clusters around 29–31 °C because the day falls squarely in the southwest monsoon season, when afternoon convection and cloud cover introduce substantial day-to-day variability.** Singapore’s climatological July average high is roughly 31 °C, yet localized thundery showers—common in the late morning and afternoon—frequently limit surface heating and keep readings at or below 30 °C. Recent National Environment Agency guidance notes drier conditions and occasional windy spells in the second week of July, which could allow clearer skies and push the peak toward 31–32 °C on any given day. At the same time, the developing El Niño and positive Indian Ocean Dipole are expected to favor above-average temperatures and reduced rainfall overall, supporting the modest probability attached to 31 °C. The near-even split between 29 °C and 30 °C therefore reflects uncertainty over whether scattered showers will develop early enough to cap the maximum or whether a drier, sunnier window will permit slightly higher readings. Official forecasts from the NEA and longer-range outlooks continue to show daily maxima fluctuating within a narrow 29–32 °C envelope, consistent with the tightly bunched market prices.