This prediction market focuses on forecasting the maximum temperature recorded at Incheon International Airport Station in Seoul, South Korea, on March 2, 2026. The market resolves based on data from Wunderground's historical weather archive for the specific weather station located at the airport, designated by the code RKSI. Participants are essentially betting on which temperature range will contain the official high temperature for that date, as measured in degrees Celsius. This type of market falls under climate prediction, blending meteorology with speculative forecasting. Interest stems from multiple areas: meteorologists testing seasonal models, financial traders hedging against weather-sensitive industries, and the general public engaging with climate trends. The specific choice of Incheon International Airport as the measurement site is significant because it is the official reference station for Seoul's metropolitan weather data, maintained to World Meteorological Organization standards, ensuring consistency and reliability for comparative analysis. Recent years have seen increased volatility in early spring temperatures across East Asia, making March forecasts particularly challenging and economically relevant. The market provides a quantified, crowd-sourced perspective on a specific climatic outcome, offering an alternative viewpoint to traditional meteorological forecasts.

Historical Context

Systematic weather observation in Seoul began in 1907, with records maintained by the Korean Meteorological Observatory, a predecessor to the KMA. The official observation site was moved to Incheon International Airport after its opening in 2001, providing a more consistent location away from Seoul's intense urban development. Historical data shows a clear warming trend for March. Between 1973 and 2022, the average March temperature in Seoul increased by approximately 2.1°C, according to KMA climate reports. This trend makes predicting "normal" temperatures for any given March day increasingly difficult. Specific precedent for March 2 exists in the historical record. For example, on March 2, 2021, the high temperature at Incheon was 12.8°C. In contrast, on March 2, 2018, the high was only 1.6°C. This historical range of over 11 degrees Celsius for the same calendar date illustrates the significant interannual variability driven by competing air masses: cold, dry Siberian highs versus warmer, moist Pacific systems. The El Niño-Southern Oscillation also influences Korean winter and spring temperatures, with El Niño phases typically associated with milder conditions.

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