The market title asks for 'Seoul', but the rules explicitly state that resolution relies on the 'Incheon Intl Airport Station (RKSI)'. The airport is coastal and can have a significant temperature difference from downtown Seoul, posing a severe geographic trap for unwary traders. Additionally, it strictly relies on unrevised integer data from Wunderground.

May 1, 2026 - May 2, 2026: The price of the 15°C option surged from 25.5c to 41.5c, and the 14°C option rose from 14.5c to 21.5c. This occurred because as the expiration date approached, updated weather forecasts strongly confirmed rainy conditions, concentrating the predicted temperature in the 14-16°C range. April 29, 2026 - May 1, 2026: No price movement exceeding 10 cents was observed, indicating that the market pricing for all options remained relatively stable.

Predicting the exact highest temperature in a specific city on a given day to a precise whole degree is a relatively niche betting topic. While weather markets exist, it is not a mainstream event that the general public quantifies and closely monitors daily.

Mainstream weather forecasts indicate that the highest temperature on May 3 will most likely be around 17°C, yet the market currently assigns the highest probability to 18°C (priced at 34.5c). This slight divergence may stem from traders relying on specific meteorological models that predict slight warming, or hedging against occasional unseasonable heat during the Argentine autumn.

Predicting the exact high temperature on a specific day in a specific city is somewhat niche and not something the general public actively thinks about, though it is a relatively common topic in prediction markets or weather derivatives.