Seoul May 2 Low Temperature: Can 11°C Hold?

Seoul’s overnight minimum temperature on May 2 is trading at 41% probability for landing exactly at 11°C. That is a narrow band to price with confidence. What makes this market genuinely interesting is the 24-hour momentum: the 11°C contract jumped 23% in a single day, moving from deep underdog to the single most-traded outcome in a multi-bucket weather market. That kind of move in a thin market demands scrutiny.

The contract resolves at 2026-05-02 12:00:00, based on the lowest recorded temperature in Seoul on that date. Total volume sits at $4,476 with $3,559 of that arriving in the last 24 hours. Liquidity of $65,992 means the order book is wide, but actual trading is sparse. Thin volume means a single large bet can reprice this market sharply before resolution.

How the Seoul May 2 Temperature Contract Works

This market resolves YES if the official minimum temperature recorded in Seoul on May 2, 2026, equals exactly 11°C. The contract does not resolve on any other value. Competing buckets cover 7°C or below, 8°C, 9°C, 10°C, 12°C, 13°C, 14°C, 15°C, 16°C, and 17°C or higher. The resolution source is market resolution, meaning the outcome is determined by verified meteorological observation for Seoul on that date.

• YES (11°C): Price 0.41, implied probability 41% — pays out if Seoul’s minimum temperature on May 2 is exactly 11°C.
• NO (any other outcome): Price 0.59, implied probability 59% — pays out if the minimum falls on any other bucket, from 7°C or below up to 17°C or higher.

The NO side wins if Seoul’s overnight low misses the 11°C mark in either direction. A warmer night pushing the minimum to 12°C or above, or a cold snap dragging it to 10°C or below, both deliver the same NO result. With eleven possible buckets and one winner, the baseline probability for any single outcome is roughly 9%. The market pricing 11°C at 41% reflects strong conviction about the temperature range, even if the exact degree is uncertain.

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Momentum and Market Signals

The momentum composite here is clear and directional. A flat 1-hour change combined with a 23% gain over 24 hours and a trend score of 55.94 points to a single catalyst: fresh weather forecast data updated overnight. Early May forecasts for Seoul typically sharpen within 72 hours of the event, and that tightening forecast window likely drove capital into the 11°C bucket as the most probable single outcome.

Total volume of $4,476 with $3,559 arriving in the last 24 hours is a meaningful concentration signal. This is not a deep market. Liquidity of $65,992 keeps spreads manageable, but with open interest at $0 and volume below $1 million, a single trade of a few hundred dollars can move the price noticeably. Treat the 41% probability as a live estimate, not a settled consensus.

• The 1-hour price change of +0.0% signals the 24-hour rally has paused, with the market waiting on updated forecast models.
• The 24-hour change of +23.0% represents the sharpest single-day move in this contract, almost certainly tied to a forecast update narrowing the expected low toward 11°C.
• The trend score of 55.94 sits in moderate conviction territory, not euphoric, but directionally committed.
• Volume below $1 million means this price can shift sharply if any trader pushes a concentrated position before the May 2 resolution window closes.

Lines Analysis: Seoul Temperature Signals

Seoul in early May sits in a meteorological transition zone. Spring warmth is establishing itself, but overnight lows in the 10°C to 13°C range are entirely normal for the first week of May. Korea Meteorological Administration forecasts for May 2 are the single most important input here. If the KMA’s short-range model is pointing to an overnight low in the 11°C to 12°C band, the 41% probability for exactly 11°C is reasonable. The market appears to be pricing the center of the forecast distribution.

The case against 11°C is not dramatic. A modest warming trend pushing the overnight low to 12°C or 13°C would send all capital to competing buckets. Equally, a late cold front dropping the minimum to 10°C or below splits the probability mass downward. Neither scenario requires an extreme weather event. Normal forecast uncertainty across a single degree is enough to make NO the majority position at 59%.

• Korea Meteorological Administration issues updated short-range forecasts within 48 hours of the event date. Any shift in the predicted overnight low will directly reprice this contract.
• Global model consensus from ECMWF and GFS, if available for Seoul on May 2, narrows the uncertainty band and could push the 11°C probability above 50%.
• A surface high pressure system over the Korean Peninsula would suppress overnight lows toward the 10°C to 11°C range, supporting the YES side.
• A maritime air mass pushing warm humid air inland overnight would lift the minimum toward 13°C to 15°C, collapsing the 11°C position.
• Clear skies and low wind forecast for May 2 night favor radiative cooling, which pushes overnight lows toward the lower end of the forecast range.

With $4,476 in total volume, this is a signal, not a settled verdict. The data from KMA’s 48-hour forecast window is the only thing that matters between now and 2026-05-02 12:00:00. The current 41% price reflects the market’s best estimate given available forecast data, but that estimate carries wide uncertainty given the single-degree resolution requirement.

LINES VERDICT

Forecast Convergence Likely, Exact Degree Still Open

Seoul’s overnight low on May 2 is plausibly landing near 11°C, and the market’s 41% probability reflects genuine forecast signal rather than noise. But pricing one exact degree at nearly even money in a thin, eleven-bucket market means the margin for error is razor-thin.

What the market says: 41% probability for 11°C, with 59% distributed across ten competing temperature buckets. The 23% single-day rally shows meaningful conviction, but thin volume below $1 million means this price is sensitive to any new forecast update before the May 2 resolution window closes.

Key unknown: The Korea Meteorological Administration’s updated 48-hour forecast for Seoul’s overnight low on May 2 is the single data point that will reprice this contract. If that model output shifts even one degree in either direction, the current 41% pricing becomes obsolete immediately.

Scientific Context: Seoul Temperature in Early May

Seoul’s climatological average minimum temperature for early May sits in the 11°C to 14°C range, based on historical Korea Meteorological Administration records. The city’s continental climate means overnight lows can vary by three to four degrees depending on synoptic conditions: clear nights with high pressure drive lows toward 10°C to 11°C, while cloudy or southerly flow nights keep minimums above 13°C. The 11°C threshold sits at the cooler edge of the normal range for this time of year, making it more likely under clear-sky radiative cooling conditions than under overcast or warm-advection setups. Before 2026-05-02 12:00:00, the only data that will move this contract meaningfully is a KMA or global model forecast update confirming or rejecting a cool, clear night scenario.

Frequently Asked Questions

• What does 41% probability mean here? The market prices the chance that Seoul’s official minimum temperature on May 2 lands at exactly 11°C at 41 cents on the dollar. That is a specific, narrow outcome in an eleven-bucket market.
• What does the NO side represent? The NO contract pays out if Seoul’s overnight low on May 2 falls on any bucket other than 11°C, covering every outcome from 7°C or below up to 17°C or higher.
• What data would move this price most? A Korea Meteorological Administration short-range forecast update placing the May 2 overnight low squarely at 11°C would push the YES probability higher. A forecast shift in either direction would reprice it lower.
• When does this market resolve? Resolution occurs at 2026-05-02 12:00:00, based on the verified minimum temperature recorded in Seoul on that date.
• Is volume reliable here? Total volume of $4,476 is well below $1 million, which means this market’s price can shift sharply on a single trade. Treat the 41% probability as a live, volatile estimate rather than a deep-market consensus signal.

This analysis reflects market conditions as of 2026-05-01 08:11:52. Prediction market probabilities are volatile and shift as new data and regulatory decisions emerge, especially as the 2026-05-02 12:00:00 resolution date approaches. Lines.com does not accept bets or provide financial or gambling advice. All market outcomes are uncertain.