Singapore’s Meteorological Service forecasts a daily maximum near 32°C on May 17 amid inter-monsoon conditions featuring light variable winds and scattered afternoon thundery showers. These convective outbreaks, common in May, introduce cloud cover and evaporative cooling that frequently cap peaks 1–2°C below the 32–33°C climatological mean recorded at Changi and Paya Lebar stations. Recent model runs show modest sea-breeze reinforcement and modest soil-moisture effects from prior rainfall, keeping the distribution tightly centered on 31–33°C. Updated National Environment Agency guidance expected within 24 hours will refine shower timing and intensity, the key variables that historically shift resolution between the 31°C, 32°C, and 33°C-or-higher outcomes.