There is a significant mismatch trap between the title and the rules. The title asks for the highest temperature in 'Seoul', but the resolution criteria strictly rely on data from the 'Incheon Intl Airport Station'. Incheon is coastal and outside central Seoul, often resulting in temperature differences. Traders who only read the title are highly likely to misjudge the outcome.

From March 30 to April 2, 2026, the price for '14°C' steadily climbed from 11c to 29c as weather forecasts converged and confirmed 14°C as the most likely high temperature. Between March 30, 2026, 05:05 and March 31, 2026, 03:45, the price for '17°C or higher' experienced significant volatility, dropping from 36c to 10.5c before rebounding to 29.5c, indicating severe market division over extreme high-temperature forecasts, largely driven by short-term weather model updates. Between 19:20 and 21:30 on March 29, 2026, the price for '17°C or higher' dropped from 25.5c to 13c and bounced back to 26c, while the price for '15°C' plunged from 25.5c to 13.5c. This indicates significant market indecision regarding extreme high-temperature options, likely driven by short-term weather model updates.

The title broadly says 'Shanghai', but rules strictly specify the Pudong Airport station (ZSPD), which is coastal and can have a temperature variance from downtown. Additionally, resolving purely on Wunderground's integer Celsius data and ignoring post-finalization revisions creates pitfalls for traders relying on general weather apps.

April 2, 2026 - April 3, 2026, the price of the 16°C option surged from 55c to 90.5c, because actual observation data on the resolution day mostly locked the high around 16°C. April 2, 2026 - April 3, 2026, the price of the 17°C option plummeted from 28.5c to 9.65c, because as the day progressed, the probability of reaching 17°C was highly compressed. April 2, 2026, the price of the 16°C option surged from 34.5c to 61c, because as the resolution day approaches, weather forecast data becomes more certain, making 16°C the most likely highest temperature. April 2, 2026, the price of the 17°C option rose from 23c to 43c before falling back to 28.5c, as the market oscillated between 16°C and 17°C, eventually favoring 16°C as forecasts updated. April 2, 2026, the price of the 15°C option dropped sharply from 27.5c to 10c, as the market likely adjusted its expectations for precipitation duration, betting that temperatures will still break above 15°C. March 31, 2026 - April 1, 2026, the price of the 15°C option surged from 6c to 21c, as the latest weather forecasts indicated rain on April 3, leading to lower high-temperature expectations. March 29, 2026 - April 1, 2026, the '20°C or higher' option plummeted from 28c to 2c, and the 19°C option dropped from 26.5c to 3.5c, because short-term forecasts became clearer and increased precipitation chances ruled out abnormal high temperatures. March 29, 2026 - March 31, 2026, the 16°C option surged from 17c to 37c, because forecasting models converged, ruling out extreme cold and heat, making this range the most likely outcome for the daily high.

April 1, 2026 - April 3, 2026, the price of '22°C' surged from 16.5c to 31c, and '20°C' plummeted from 30.5c to 13c, because as the resolution date approaches, updated weather forecasts slightly raised the expected high temperature, concentrating market funds into the 21°C and 22°C brackets. March 31, 2026 - April 2, 2026, the price of '21°C' surged from 8c to 32c, and '20°C' climbed from 15.5c to 24c before dipping, as updated weather models further locked the forecast center within the 20-22°C range, driving market consensus. March 30, 2026 - April 2, 2026, the price of '19°C' plummeted from 28.5c down to 4.5c (before a slight rebound), because the latest forecasts largely ruled out the possibility of highs remaining below 20°C. March 31, 2026 03:45 - April 1, 2026 13:20, the price of '21°C' surged from 8c to 26c, and '22°C' also spiked from a low of 4.5c (at 19:10 on March 30) to 21.5c, as nearing the resolution date, updated weather models shifted the expected high-temperature center to this specific range. March 29, 2026 20:25 - March 30, 2026 06:10, the Yes price of '15°C' plummeted from 26.5c to 4.6c, '16°C' dropped from 26c to 12.5c, and '24°C or higher' briefly spiked from 25.5c to 36.5c before plunging to 21c. Extreme temperatures were ruled out by weather models, leading the market to quickly correct the pricing. March 29, 2026 20:25 - 21:30, the Yes prices for several options like '21°C' and '23°C' plummeted by more than 10c as weather forecasts became more precise, correcting the valuation of these early high-temperature options.

April 2, 2026 - April 3, 2026, the price of 28°C surged from 23c to 55.5c, as real-time meteorological data and the daytime warming trend significantly increased the probability of the high reaching 28°C on the target date. April 1, 2026 - April 2, 2026, the price of 28°C surged from 23c to 40.5c as approaching the target date prompted slight upward revisions in the daytime high temperature forecast, causing market capital to quickly concentrate on this option. April 1, 2026 - April 2, 2026, the price of 27°C surged from 23.5c to 36.5c, as short-term weather models further ruled out lower temperatures, making 27°C and 28°C the most likely peak temperature targets. April 2, 2026, the price of 26°C plummeted from 20.5c to 10c, as the latest forecasts indicated stronger daytime solar heating or warm air currents, making it highly likely that the high temperature would exceed the 26°C threshold. March 31, 2026 - April 1, 2026, the price of 27°C surged from 20c to 30c, while 28°C plummeted from 27c to 15c, as the latest short-term meteorological models converged, narrowing the expected high temperature closer to 27°C.

Predicting the specific high temperature on a single day in a specific city belongs to weather prediction markets, which are relatively niche and granular. While specialized players track such data, the general public rarely ponders this exact question.

April 1, 2026 - April 2, 2026, as forecast models revised the timing and intensity of the cold front, the predicted high for April 4 rebounded from around 68°F to near 72°F. Consequently, the price for 72-73°F recovered from 14c to 23c; 74-75°F briefly surged to 31.5c before settling at 27c; and the previously favored '67°F or below' dropped from 12.5c to 4.5c. March 31, 2026 - April 1, 2026, prices for '67°F or below' and '68-69°F' continued to hover at low levels (dropping from ~14c to 5-7c), while '76-77°F' retreated to 20.5c after hitting a peak of 31c. This volatility reflects market uncertainty before the cold front forecast models fully solidified. March 29, 2026 - March 31, 2026, due to updates and stabilization of weather forecast models, the price for 76-77°F surged from 12c to 31c, becoming the favorite; meanwhile, the price for 74-75°F also rose from 14.5c to 26c. March 29, 2026, 19:20 - 21:30, most options experienced drastic fluctuations. For instance, the price for 72-73°F plummeted from 25.5c to 12c before recovering to 22c; 67°F or below dropped from 25.5c to 12c and then rose to 14c. This was caused by significant short-term updates and divergences in weather forecasting models, leading to rapid adjustments in market expectations.