Official National Environment Agency (NEA) observations from the Changi Airport climate station—the market's sole resolution source—confirm the highest temperature reached 33°C this afternoon amid inter-monsoon conditions with light winds and afternoon thundery showers, which capped peak heating. As of 9pm local time, temperatures have fallen to the low 30s with showers clearing, aligning with Singapore's typical diurnal cycle where maxima occur mid-afternoon before nocturnal cooling sets in. Trader consensus at nearly 100% implied probability for 33°C reflects this data-driven certainty, bolstered by historical April highs averaging 31–33°C at Changi. A late-evening heat surge to 34°C+ remains theoretically possible but improbable given declining solar insolation and cloud cover; final NEA daily records expected post-midnight will resolve the market.