On April 27, 2026, the price of the '19°C or higher' option surged from 12c to 32.5c, while the '18°C' option rose from 17.5c to 33c. This was driven by the latest weather forecasts for the Toronto area, which significantly raised the expected Tuesday afternoon high temperatures to around 18-19°C.

Predicting the exact highest temperature on a random day in a specific city is highly niche. Unless specifically participating in weather markets, most people would never think about this, making it quite an exotic market.

The market pricing indicates a high probability for 8°C, 9°C, and even 10°C (totaling over 70%), whereas mainstream weather forecasts predict the daily high to be around 6°C to 7°C. The market's expectation is notably warmer than the actual meteorological forecasts, possibly reflecting earlier models or a lagging response to recent warming trends.

Betting on the specific highest temperature of a city on a given day is a standard derivative market in prediction markets. While not as mainstream as political elections, it is not an absurdly bizarre question and is quite natural for users who track weather.

There is a significant geographical trap in this market: the title asks for the lowest temperature in Seoul, but the rules explicitly state that data from the Incheon Intl Airport Station (RKSI) will be used. Incheon Airport is coastal and its temperatures often differ significantly from central Seoul. Additionally, the resolution uses whole degrees Celsius, meaning rounding/truncation rules require attention.