Seoul July 26 High Temp: Will It Hit Thirty-One Celsius?

Seoul’s weather market is moving fast. The contract asking whether July 26 brings a daily high of exactly 31°C has surged nearly 11% in 24 hours, pushing the implied probability to 46%. That momentum is significant for a market resolving in less than 18 hours. The price is telling us traders are increasingly convinced the thermometer lands on that specific rung, but a 46% read means this is genuinely contested terrain.

The market question asks whether Seoul’s highest temperature on July 26 reaches exactly 31°C. The YES price sits at 0.46, with NO at 0.54. The market closes July 26 at 12:00 UTC, with total volume at $59,340 and 24-hour volume at $50,922, representing a heavy burst of late activity.

How the Seoul July Twenty-Six Temperature Contract Works

This contract resolves YES if Seoul’s official daily maximum temperature on July 26 registers exactly 31°C. Any reading above or below that single degree mark resolves NO. The outcome field lists 31°C as the primary outcome, with alternatives including 30°C, 32°C, 33°C or higher, and a full range down to 23°C or below. Resolution comes from the official market resolution source tied to Seoul’s measured maximum.

• YES (31°C exactly) — 0.46 (46% implied probability): Seoul’s July 26 high lands precisely at 31 degrees Celsius.
• NO — 0.54 (54% implied probability): Seoul’s July 26 high registers any temperature other than 31°C, including 30°C, 32°C, or higher.

For NO to pay out, Seoul simply needs to miss 31°C in either direction. Seoul’s late July temperatures average in the low-to-mid 30s Celsius during heat-dominant years, meaning a reading of 32°C or 33°C is a plausible NO scenario. Equally, a brief cooling event dropping the day’s peak to 29°C or 30°C also resolves NO. The window for a YES is one degree wide in a city known for volatile summer peaks.

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Momentum and Market Signals Pointing Toward Thirty-One

The momentum composite here is genuinely striking. A combined 1-hour move of +6.5% and a 24-hour move of +11.0%, with a trend score of 56.39, reflects a market where traders are actively adjusting toward YES as the resolution date closes in. That kind of intraday repricing on a short-duration weather market usually tracks a weather forecast update or a local temperature observation that anchors expectations. Seoul’s Korea Meteorological Administration publishes regular short-range forecasts, and traders on this contract are likely following those closely.

Total volume of $59,340 is thin by major market standards, and 24-hour volume of $50,922 means nearly all the trading happened in the last day. Liquidity sits at $88,893, which is actually higher than total volume, a sign the order book has depth relative to the contract size. Still, volume below $1 million means a single large trade can reprice this contract sharply before close. Here’s what the measurements are telling us: this is a market where conviction is building quickly, but the thin volume makes any late forecast update a meaningful price mover.

• Seoul’s July 26 maximum temperature forecast from the Korea Meteorological Administration is the single most direct input. Any official forecast landing at 31°C anchors YES; a 32°C or 30°C call pushes NO.
• 24-hour price change of +11.0% reflects a strong directional move toward YES, likely driven by forecast data aligning with the 31°C threshold.
• 1-hour change of +6.5% confirms the repricing is recent and accelerating as resolution approaches.
• Liquidity at $88,893 versus volume at $59,340 means the order book is deeper than the trading so far, but thin total activity amplifies price sensitivity to new data.
• The resolution window closes July 26 at 12:00 UTC, giving traders only hours to react to any final forecast revisions or early observational data from Seoul.

Lines Analysis: Seoul’s Summer Range and the Thirty-One Degree Target

Seoul in late July sits squarely in its hottest season. The city’s average daily maximum in late July historically runs between 29°C and 34°C, with humid continental air masses and the tail end of the East Asian monsoon shaping day-to-day swings. A reading of exactly 31°C is not an outlier; it sits comfortably within the typical range. The +11% move toward YES over 24 hours suggests traders have seen forecast data pointing directly at that threshold. When a short-duration weather contract reprices this aggressively this close to resolution, it usually means forecast models have converged.

The data doesn’t care about the politics: what makes NO real here is the natural variability in Seoul’s July peak temperatures. A 32°C or 33°C day is entirely plausible if a heat dome holds over the Korean Peninsula. Equally, a thunderstorm or cloud cover can cap the daily maximum at 29°C or 30°C. The Korea Meteorological Administration’s forecasts for Seoul carry a typical accuracy window of plus or minus one to two degrees at 24-hour range, which is exactly the margin of error that makes this contract genuinely uncertain despite the momentum.

Signals to monitor before resolution:

• Korea Meteorological Administration’s July 26 forecast update for Seoul: a 31°C call is a direct YES signal, while 32°C or 30°C shifts probability toward NO.
• Early morning observational temperature readings from Seoul weather stations: if the overnight low suggests a trajectory toward the low 30s, YES probability firms further.
• Regional synoptic weather pattern: a strengthening high-pressure system over the Korean Peninsula raises the daily maximum; a frontal boundary or precipitation event caps it.
• Humidity and cloud cover reports from Seoul: high humidity with clear skies favors a peak in the 31°C-33°C range, cloud cover suppresses it.
• Any final Polymarket price move in the last two hours before close: thin liquidity means late-informed traders can move the price significantly.

Total volume of $59,340 is modest, but the concentration of $50,922 in 24 hours shows this market came alive as forecast data sharpened. The market is pricing uncertainty, not science: the data slightly favors NO simply because the exact 31°C outcome competes with a range of alternatives, but the momentum clearly favors YES as the most likely single outcome. The next Korea Meteorological Administration forecast update is the key remaining catalyst.

LINES VERDICT

LEANING YES, CONTESTED

The 11% surge toward YES in 24 hours reflects forecast data converging on 31°C as Seoul’s July 26 peak, but a one-degree resolution window in a volatile summer market keeps this genuinely uncertain.

What the market says: At 46% implied probability, the market prices 31°C as the single most likely outcome but not a certainty. Thin volume below $1 million means any late forecast revision or early observational data could swing the price sharply before the July 26 close.

Key unknown: The Korea Meteorological Administration’s next forecast update for Seoul on July 26 is the single most important data point. A confirmed 31°C forecast firms YES significantly; any deviation of one degree in either direction reprices this contract fast.