The title mentions 'Seoul,' but the rules explicitly state the resolution source is the Incheon Intl Airport Station. Given the geographical distance, temperature differences may occur. Users relying solely on downtown Seoul's weather data might be misled. Additionally, data resolves only to whole degrees Celsius.

April 9, 2026 - April 10, 2026, the price of '23°C or higher' surged from 7.5c to 38.5c on the night of April 9 before plunging back to 11-15.5c on April 10. Concurrently, '21°C' dropped from 26c to 9c, and '20°C' spiked from 12.5c to 28c before retreating. This massive volatility was driven by significant divergence among major weather models (ECMWF and GFS) regarding ridge strength and cloud cover over the Korean Peninsula, leading to short-term speculation on unseasonably warm outliers. April 6, 2026 - April 8, 2026, no significant price movements over 10c were observed in the past 3 days.

Predicting the exact highest temperature for a specific city on a given day is a classic niche weather market. While not as mainstream as elections, it is quite common among weather bettors and not extremely bizarre.

April 9, 2026 - April 10, 2026, the price of the '80°F or higher' option experienced wild fluctuations, plunging from 34c to 7.5c before rebounding to 15.5c; meanwhile, '76-77°F' and '72-73°F' also saw whipsaws exceeding 10c. This was caused by constant adjustments in meteorological models regarding the strength of the incoming upper-level ridge and warm air advection for April 13, causing market expectations for extreme heat to swing. April 7, 2026 - April 9, 2026, due to the lack of extensive multi-day historical snapshots, no significant price movements exceeding 10 cents in a single direction were detected. Market prices fluctuated normally.

April 9, 2026 - April 10, 2026, the price of the '82°F or higher' option dropped from 90c to 76c. This is due to some weather models slightly lowering peak temperature forecasts as the resolution date approaches, increasing the probability of the 80-81°F bracket. Concurrently, the price of '80-81°F' surged from 18c to 25c on April 9 before falling back to around 10c, reflecting forecast uncertainty causing capital to bounce between adjacent brackets. April 9, 2026 - April 10, 2026, the '78-79°F' option briefly spiked to 13.8c before retreating to 1.5c, indicating short-term hedging by traders against cooler-than-expected temperatures.

From 2026-04-09 16:53:18 to 2026-04-10 17:48:18, the price of the 14°C option fluctuated from 34.5c to 38.5c, showing an overall upward trend, reflecting increased market confidence in this temperature range. From 2026-04-09 07:08:18 to 2026-04-10 15:38:17, the price of the 13°C option dropped from 23.5c to 17.5c, indicating reduced market expectations for this temperature range. From 2026-04-09 07:08:18 to 2026-04-10 15:38:17, the prices of the 11°C and 12°C options both fell by more than 10c, as weather models favored higher temperatures as the forecast date approached.

2026-04-09 - 2026-04-10, the price of the 20°C option plummeted from 24c to 10.05c, while the 21°C option surged from 13c to 25.5c. This was caused by an update in short-term meteorological forecasting models, which revised the expected peak temperature for Toronto upwards by 1-2 degrees, triggering rapid capital rotation among adjacent temperature brackets.