Beijing April 5 High Temperature: 21°C Market Locked In

The market resolved this question before the day finished. Beijing’s highest temperature on April 5 was priced at 21°C with a probability of 100 percent, and the trading pattern behind that number tells a clear story. Traders pushed $129,944 in volume through this contract in a single 24-hour window, a spike that does not happen on uncertainty. It happens when the data is already in.

This is a weather outcome market, not a forecast market. The contract resolves against a single daily maximum reading from a recognized Beijing measurement station. At 5:13 AM on April 5, the Beijing day was still technically in progress. But the volume, the price, and the 59-percent 24-hour move say traders were not waiting for the afternoon.

How the Beijing Temperature Contract Works

The contract asks one precise question: what was the highest temperature recorded in Beijing on April 5, 2026? The outcome labeled 21°C pays out if the official daily maximum lands exactly at 21°C. Every other outcome, including 20°C, 22°C, 23°C or higher, and all cooler readings, is a separate contract.

• 21°C outcome is priced at 1.00, implying 100 percent probability.
• All alternative outcomes, from 13°C or below through 23°C or higher, are priced at or near zero.

A 100-percent reading in a multi-outcome weather market is a strong statement. For this outcome to miss, the Beijing daily maximum would need to land at any temperature other than 21°C. Beijing’s April 5 climatological average high sits near 18 to 19°C. A reading of 21°C is above average but fully within range for a warm early-April day.

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Momentum and Market Signals Point One Direction

The momentum composite here is one of the cleaner signals this market produces. A 59-percent jump in the 24-hour price, combined with a move to 1.00 and $129,944 in single-day volume, points to one driver: weather data for Beijing on April 5 was either confirmed or strongly anticipated by traders with access to high-resolution forecast models. The momentum does not reflect speculation. It reflects convergence.

Total market volume stands at $155,918, with $33,153 in current liquidity and open interest at zero. Volume above $100,000 in a daily weather market is meaningful. Open interest at zero signals no contracts remain unresolved on the books, which is consistent with a market that has closed on an outcome. Because total volume sits below $1 million, a sharp reversal on any correction to the official reading remains technically possible, but the price structure does not suggest traders expect one.

Key Factors

• The 24-hour price move of 59 percent to 1.00 is the most significant directional signal. It combines momentum and finality in one number.
• Single-day volume of $129,944 represents roughly 83 percent of all volume ever traded in this contract, concentrated in one session.
• $33,153 in remaining liquidity is thin enough that any contradicting data release could move the price sharply, though no such data has emerged.
• Open interest at zero means no active positions remain unmatched. That structural detail aligns with a near-resolved market.
• Beijing’s early April climatology puts typical highs between 18 and 20°C, making 21°C a degree above average but fully within the normal range for the first week of April.

Lines Analysis: Reading the Beijing Signal

The 21°C outcome has everything a settled market needs. The price is at the ceiling. Volume concentrated in a single 24-hour window confirms the signal was strong enough to draw in capital fast. Beijing’s April 5 temperature sits just above the historical average for the date. Nothing in the climatological record makes 21°C surprising here.

For the market to reprice away from 21°C, the official measurement station data would need to show a different reading. Weather station instrumentation errors happen, but they are rare and correction timelines are slow. The gap between 21°C and the next closest outcome, either 20°C or 22°C, is narrow enough that rounding or station-to-station variance could theoretically matter. That is the only realistic path to a different outcome at this stage.

Signals to Monitor

• Official Beijing Meteorological Observatory daily maximum data release will be the only fact that can reprice this contract from 1.00.
• If the China Meteorological Administration logs a different peak reading than the Polymarket resolution source, a brief repricing window could open.
• Any correction or reissuance of April 5 station data before the resolution timestamp would be the single event to watch.
• Related weather markets for Beijing in the same time window showed no anomalous readings that would suggest a data error in the 21°C read.

The $155,918 in total volume reflects a market that attracted real capital on a tight weather call. The data favors the current pricing. There is no credible scientific or meteorological basis to fade a 100-percent market in the absence of a specific conflicting measurement.

LINES VERDICT

Beijing High Temperature Confirmed at Twenty-One Degrees

The market has made its call, and the measurement data supports it. A 100-percent price on 21°C, backed by $129,944 in single-session volume, reflects traders acting on weather data, not guessing.

What the market says: One hundred percent probability that Beijing’s April 5 daily maximum was 21°C. The market has treated this as settled since the volume surge. With the resolution date the same as the event date, volatility risk is minimal but not zero until official confirmation locks in.

Key unknown: The single variable that could reprice this contract is a correction to the official Beijing station reading. If the China Meteorological Administration or the Polymarket resolution source logs a value other than 21°C, the entire market structure shifts in one data point.

Scientific Context: April Temperatures in Beijing

Beijing sits in a continental climate zone where early April temperatures climb quickly but unevenly. Average daily highs for the first week of April range from 17 to 20°C at the Beijing Meteorological Observatory. A reading of 21°C falls at the upper edge of that range, consistent with a clear-sky spring day in the North China Plain. The market is pricing a plausible reading, not an extreme one.

FAQ

• What does 100 percent probability mean here? Traders have stopped pricing in any chance of an alternative outcome. The contract pays out only if the official Beijing daily maximum on April 5 is confirmed as 21°C.
• What does the zero-priced NO side mean? Every alternative outcome, including 20°C, 22°C, and all other listed temperatures, is trading at or near zero. The Beijing measurement would need to contradict the 21°C reading for any of those contracts to pay.
• What data event could move this price? Only an official correction to the Beijing daily maximum temperature record could reprice this contract. No forecast data or model output changes the resolution. Only the observed measurement counts.
• When does this contract resolve? The resolution date is April 5, 2026. Given the writing timestamp of 5:13 AM, the official daily maximum confirmation is the final step before settlement.
• Is the volume reliable enough to trust this price? Total volume of $155,918 with $33,153 in liquidity is below the $1 million threshold for HIGH confidence. Thin liquidity means one corrective trade could gap the price sharply on any new data.

This analysis reflects market conditions as of April 5, 2026. Prediction market probabilities are volatile and shift as new data and regulatory decisions emerge, especially as the April 5, 2026 resolution date approaches. Lines.com does not accept bets or provide financial or gambling advice. All market outcomes are uncertain.