Shanghai experiences variable spring weather in mid-April as temperatures transition toward warmer early-summer conditions typical of eastern China. A daily high of 22°C represents a mild threshold near the seasonal average for this period, sitting at the midpoint of typical April ranges. This market resolves using the highest temperature officially recorded in Shanghai on April 20, 2026, as measured by the China Meteorological Administration using standard meteorological instruments. Current odds imply that market participants expect cooler-than-average conditions that day, with YES trading at 14% and NO at 86%. The 14% probability suggests traders anticipate temperatures will remain below the 22°C threshold based on available forecasts and seasonal patterns. Shanghai's typical April temperature range spans approximately 18–24°C, placing this 22°C threshold near the middle of the seasonal distribution. Temperature measurements are objective and unambiguous, ensuring straightforward market resolution without interpretation disputes or ambiguity. Participants trading this weather market typically evaluate current meteorological forecasts, historical temperature patterns for the season, regional climate trends, and incoming weather systems when making trading decisions. Such weather-based prediction markets provide a mechanism for traders to express probabilistic views on temperature outcomes.