Shanghai's highest temperature on April 18 will be tracked against official meteorological records. The market poses a specific condition: the maximum daily temperature will be exactly 17°C, not higher or lower. With current odds at 1% YES, traders are pricing this outcome as highly unlikely. Early April in Shanghai typically sees temperatures in the 15–20°C range during spring, with variable weather patterns driven by monsoon transitions. The precision required—matching exactly 17°C rather than any temperature within a range—explains the low conviction. Official weather stations record temperature data to one-tenth of a degree, making verification straightforward and objective. Recent 24-hour trading volume of $5,341 reflects moderate interest in daily weather markets. The odds trajectory suggests declining conviction in this exact outcome as April 18 approaches, typical for weather markets with narrow thresholds. Resolution occurs at midnight UTC on April 18 based on Shanghai's official maximum temperature reading for that calendar day.