Wuhan Hit 35°C on July 9: Market Confirmed the Heat | Lines.com

Wuhan recorded a peak temperature of 35 degrees Celsius on July 9, 2026, resolving this Polymarket temperature bracket in favor of the 35°C outcome. The result landed squarely within the historical range for Wuhan in peak summer, a city long recognized among China’s hottest urban centers. Traders who held the 35°C position from the market’s open saw the probability move from 31 percent all the way to full resolution.

The market opened at 31 percent implied probability for 35°C, signaling early skepticism about this specific bracket. By the time July 9 arrived, the 24-hour price movement had surged 63.5 percent, with a single-session jump of 38 percent on resolution day itself. $64,655 in total volume flowed through this market, with $48,005 of that arriving in the final 24 hours. That late concentration tells you where the conviction actually lived.

Wuhan Reached 35°C on July 9, Closing the Market

The 35°C outcome resolved as confirmed on July 9, 2026, the market’s stated end date. Wuhan sits in the Yangtze River basin and reliably ranks among China’s most heat-exposed cities during July and August. Peak daily temperatures in this window historically cluster between 33°C and 37°C, placing 35°C near the center of the seasonal range. The resolution aligned with what the atmospheric record for this region consistently shows.

The final probability at close reached 100 percent as the measured temperature confirmed the bracket. The late price convergence was sharp: most of the upward movement compressed into the final two calendar days. The market did not drift gradually to resolution. It snapped.

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How the Market Priced This Outcome

The 35°C bracket opened at 31 percent implied probability, meaning traders initially assigned roughly a one-in-three chance to this specific temperature range. That was an underpriced YES. The outcome resolved in favor of a bracket sitting within Wuhan’s well-documented climatological norm for early July. The market started cautious and corrected aggressively in the final 48 hours.

$64,655 in total volume provides a moderate base for a daily temperature market, and $51,528 in liquidity supported reasonable price discovery. However, 74 percent of total volume arrived in the last 24 hours alone. That late concentration indicates the market found its footing late, not early.

• Resolution Outcome: 35°C confirmed on July 9, 2026.
• Article-Time Probability: 31% (market open implied probability).
• Final Price at Close: 100% (fully resolved).
• Total Volume: $64,655.
• Market Assessment: Underpriced YES. The market opened skeptical on a bracket well within Wuhan’s seasonal norm, then corrected sharply as real-time data arrived.

What This Resolution Means for Temperature Market Design

Daily temperature bracket markets live or die on climatological base rates. Wuhan’s July temperature distribution is well-documented, with peak daily highs clustering between 33°C and 37°C across multiple decades of modern records. A market that opens at 31 percent on a bracket near the center of that distribution is pricing uncertainty, not science. Here’s what the measurements are telling us: the data doesn’t care about the politics of whether a number feels too hot or not hot enough.

The sharp late correction, 38 percent in a single session on July 9, reflects how daily temperature markets tend to behave structurally. Traders wait for observed data, not forecasts, to commit capital. That behavior compresses resolution into the final hours. Whether a 24-hour observation window is the right structure for capturing temperature uncertainty is a question future market designers should examine.

• Wuhan’s July climatological base rates favor peak daily temperatures in the 33°C to 37°C range, placing the 35°C bracket near the center of seasonal probability.
• Late-volume concentration (74 percent arriving in 24 hours) confirms traders rely on real-time weather observation rather than early forecast-driven conviction.
• Scalar temperature markets with multiple outcome brackets need clear meteorological sourcing to build early trader confidence and tighter opening prices.
• The 35°C resolution fits a broader pattern of sustained heat across the Yangtze basin, a region under measurable thermal pressure in recent summer seasons.

LINES RESOLUTION VERDICT

UNDERPRICED YES

The 35°C bracket resolved within Wuhan’s documented seasonal norm, confirming what the city’s long-term temperature record consistently shows about peak July heat.

What the market showed: The 35°C outcome opened at 31% implied probability and closed at 100% on resolution day. Traders underpriced a bracket sitting near the center of Wuhan’s July temperature distribution, then corrected aggressively in the final 24 hours as observed data confirmed the result.