Singapore's equatorial location produces consistently warm conditions in mid-May, with historical daily maximum temperatures averaging 31–32°C amid high humidity and light variable winds during the inter-monsoon period. Afternoon convective showers, driven by daytime heating and instability, frequently limit peak readings by enhancing cloud cover and evaporative cooling, which explains why traders assign roughly equal weight to 31°C, 32°C, and 33°C as the most probable outcomes. Recent seasonal guidance indicates potential for brief excursions above 33°C on drier days, yet localized thundery activity often caps extremes, keeping probabilities for 34°C or higher modest while rendering sub-30°C readings unlikely absent widespread rain throughout the daylight hours.