Trader consensus on Polymarket closely splits between 31°C (33.5%) and 32°C (32.5%) for Singapore's highest temperature at Changi Airport on April 17, driven by the National Environment Agency's (NEA) fortnightly outlook for inter-monsoon conditions featuring afternoon thundery showers that often cap daily maxima through increased cloud cover and convective cooling. Recent observations, including April 16's early high of 31.5°C at Sembawang, align with typical April climatology where equatorial solar heating pushes peaks toward 31–33°C, but patchy showers introduce 1–2°C uncertainty via timing of sea breeze convergence and cumulus development. Less widespread rain could favor 32–33°C, while heavier coverage supports 31°C or below; monitor NEA's 24-hour updates for refined model guidance.