Predicting exact daily temperatures for a specific location is a common niche category within prediction markets. While people check weather forecasts daily, betting on the exact peak degree for a specific day is not a mainstream consideration in daily life, making it moderately novel.

The title specifies 'Seoul', but the resolution rules strictly dictate using data from the 'Incheon Intl Airport Station' (RKSI). Since Incheon Airport is located on a coastal island and is geographically outside Seoul city proper, actual high temperatures often differ significantly between the two locations. This is a classic mismatch trap between the title and the fine print.

April 24, 2026 - April 25, 2026, the price of '20°C or higher' plummeted from 88.5c to 64.5c, while '19°C' surged from 7c to 27.5c. This was driven by minor adjustments in weather forecast models for the weekend, which slightly downgraded the expected high to the 19-20°C threshold. April 22, 2026 - April 24, 2026, the prices of all options remained stable, with no option experiencing a drastic fluctuation of more than 10 cents.

Weather prediction markets are relatively common on forecasting platforms and not extremely bizarre, but guessing the exact highest temperature of a specific city on a random day is still quite niche and trivial. The general public rarely thinks about such questions deliberately.