Chengdu, the capital of China's Sichuan province, sits in south-central China where late spring weather patterns bring warming temperatures. This daily prediction market asks whether the highest temperature in the city will remain at or below 25°C on May 19, 2026. Currently, the YES odds of 0% reflect overwhelming trader consensus that Chengdu will exceed this threshold on the specified date, indicating near-total conviction in a warmer outcome. The market is objectively resolvable based on official meteorological data recorded by Chengdu's weather monitoring services. Chengdu's May climate typically sees high temperatures ranging from 24 to 30 degrees Celsius, making the 25°C threshold sit near the lower end of typical springtime conditions for the region. The extreme tightness of the current odds—with YES trading at 0%—suggests traders perceive minimal probability of a cooler day and high confidence in surpassing this temperature benchmark. This spread reflects the market's assessment of atmospheric patterns and seasonal norms.
What factors could move this market?
Chengdu, located in the Sichuan Basin in south-central China, experiences a subtropical humid monsoon climate characterized by moderate to heavy rainfall and warm temperatures sustained throughout the year. The city's geography—nestled within a basin surrounded by mountains and hills—effectively traps warm, moist air masses, contributing to its characteristically mild winters and consistently warm springs and summers. As one of China's cloudiest major cities, Chengdu receives substantial precipitation, yet even cloudy days in May typically feature daytime highs in the comfortable mid-20s to low-30s Celsius range. May marks the critical transition period from spring into early summer, when daytime temperatures typically range between 24 and 32 degrees Celsius, reflecting the advancing season and increasing solar insolation.
Several meteorological factors support the probability of the daily high exceeding 25°C on May 19. Historical May weather data compiled over decades for Chengdu demonstrate that daytime highs below 25°C are statistically uncommon, occurring in approximately 10-15% of May days in typical years. When such cooler days do occur, they typically follow unusual overnight precipitation, require sustained heavy cloud cover, or coincide with atypical cold air masses briefly intruding into the region from the north. The city's basin location and subtropical climate patterns establish sustained warming as the dominant meteorological trend throughout May. Solar radiation increases markedly as summer approaches, and prevailing atmospheric circulation patterns favor warmer air masses flowing into southern China from tropical latitudes. Unless an unusual springtime cold front penetrates deep into Sichuan Province—a genuinely infrequent meteorological occurrence in mid-May—sustained high temperatures above 25°C represent the statistical baseline and normal expectation.
Conversely, achieving a below-25°C outcome would require convergence of specific meteorological conditions: an unusual springtime cold front moving through Sichuan, persistent heavy cloud cover preventing daytime solar heating, or a prolonged cool, wet weather system blocking warming trends. These scenarios remain meteorologically possible but statistically uncommon in mid-May for this subtropical location. The precision required for multiple weather factors to align on exactly May 19 significantly reduces the mathematical probability of this outcome occurring.
The current market pricing at 0% YES reflects traders' rational assessment based on historical climatology and seasonal expectations. Market participants have effectively priced out the cooler scenario entirely, indicating collective confidence in Chengdu exceeding the 25°C threshold. Resolution depends entirely on Chengdu's official meteorological station recording—a transparent, objective measurement that eliminates any interpretive ambiguity regarding the day's maximum temperature.
What are traders watching for?
May 19 Chengdu maximum temperature official reading from China Meteorological Administration or local weather station.
Cloud cover and precipitation patterns in Sichuan on May 19 could influence final temperature outcome and market resolution.
Seasonal warming trend and solar radiation intensity in late May typically favor above-25°C outcomes in Chengdu's subtropical climate.
Unusual cold air masses or weather systems affecting southern China in late May could test market assumptions about warming.
How does this market resolve?
Market resolves YES if Chengdu's official recorded maximum daily temperature on May 19, 2026 is 25°C or below, verified by China Meteorological Administration data.
Polymarket Trade is an independent third-party interface to the Polymarket CLOB prediction market exchange on Polygon — not affiliated with Polymarket, Inc. Prediction markets aggregate trader expectations into real-time probability estimates. Every market question resolves YES or NO based on a specific event outcome; traders buy shares of the side they believe will resolve positively. Prices range 0¢ (certain no) to 100¢ (certain yes) and naturally reflect the crowd-implied probability of YES. Polymarket Trade is non-custodial — your funds never leave your wallet. Open the full interactive page linked above to place orders, see order book depth, and execute a trade.
