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Wuhan July 22 Peak Temp: Will It Hit Thirty-One?

Wuhan July 22 Peak Temp: Will It Hit Thirty-One?

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SR Sofia Renard Climate & Science Analyst
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Lines Verdict
NO at 57% implied probability

MOMENTUM WITHOUT MAJORITY: The 31°C outcome carries the strongest recent price signal, but at 43% it has not crossed the majority threshold. Market probability: 43%.

43% Market Probability
1h +12.5% 24h +10.5% Trend Moderate (66/100)
Volume
$67.0K
$47.7K in 24h
Liquidity
$91.2K
Moderate depth
Time Left
22 hours
Resolves Jul 22
67K Vol. Jul 22, 2026
31°C $16K Vol.
43%
30°C $4K Vol.
27%
32°C $5K Vol.
22%
29°C $5K Vol.
7%
33°C $4K Vol.
6%
34°C $4K Vol.
1%

Wuhan is running hot this week, and the prediction market is catching up fast. The 31°C outcome has surged from a long-shot to the market leader, with traders pushing the implied probability to 43% in the past 24 hours. That is a sharp re-rating for a single-day temperature call, and the momentum behind it is hard to ignore.

The market question is straightforward: will Wuhan’s highest temperature on July 22 land exactly at 31°C? The YES price sits at 0.43, the NO price at 0.57, and the contract resolves at 12:00 UTC on July 22, 2026. Total volume has reached $67,049, with $47,727 of that trading in the last 24 hours alone.

How the Thirty-One Degree Contract Works

This contract resolves YES if Wuhan’s official daily maximum temperature on July 22 is recorded at exactly 31°C. Resolution follows the market’s designated data source. Any other reading, whether 30°C, 32°C, or any other outcome listed, pays out NO on this specific contract.

  • YES (31°C exactly): priced at 0.43, implying a 43% probability.
  • NO (any other temperature): priced at 0.57, implying a 57% probability.

The NO side wins when Wuhan’s maximum lands anywhere outside 31°C. The city’s July temperatures routinely cluster in the 30-35°C range, so the spread across multiple outcome contracts is genuinely competitive. A reading of 32°C or 33°C, both plausible given Wuhan’s mid-July climatology, would kill this YES contract entirely.

Momentum and Market Signals

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The combined momentum signal here is unusually strong for a short-duration weather market. The 1-hour price change of +12.5%, a 24-hour change of +10.5%, and a trend score of 66.13 all point in the same direction. That kind of coordinated move in a sub-$100K market almost always traces back to a specific weather forecast update, likely a model run in the past 12-24 hours showing 31°C as the central estimate for Wuhan on July 22.

Total volume of $67,049 is modest, and $47,727 of that arrived in just 24 hours. Liquidity stands at $91,246, which is actually higher than total volume, a sign that the order book is relatively well-stocked. Still, this is a thin market by any standard. A single large trade can move the price sharply before the contract closes tomorrow.

  • The 1-hour price surge of +12.5% and the 24-hour gain of +10.5% together signal a forecast-driven repricing, not random noise.
  • The 30-day low was 0.26, meaning this contract has nearly doubled in implied probability since it opened.
  • Liquidity exceeds volume, which means the order book can absorb new trades, but price remains sensitive to concentrated activity.
  • The July 20 move of +6.5% and the July 21 move of +12.5% form an accelerating pattern that typically reflects converging weather model consensus.
  • Trader sentiment reads 43% YES and 57% NO, a leaning-bearish structure despite the recent surge.

Lines Analysis: Wuhan’s July Temperature Window

Wuhan sits in the Yangtze River basin, a region known for intense summer heat. July maximums in the city historically range from the low 30s to the upper 30s Celsius, with occasional spikes above 40°C during heat waves. A reading of exactly 31°C would place July 22 at the cooler end of that range, consistent with a partly cloudy day or a modest cold front influence. The market’s move toward 43% suggests at least one major forecast model has converged on that number.

The path to NO winning is wide. Wuhan could easily land at 32°C or 33°C, which is more typical for mid-July, or drop to 30°C if cloud cover or precipitation holds temperatures down. The city’s weather is sensitive to the Western Pacific subtropical high, which shifts Yangtze basin temperatures by several degrees depending on its position. If that ridge strengthens even slightly before July 22, the reading could overshoot 31°C entirely.

  • A strengthening Western Pacific subtropical high would push Wuhan above 32°C, invalidating the YES contract.
  • Increased cloud cover or a short-wave trough moving through central China could hold the maximum to 30°C or below, also resolving NO.
  • Persistent forecast model agreement at exactly 31°C in the next 12-hour model runs would likely push YES pricing above 50%.
  • Any rainfall event on the morning of July 22 could suppress the maximum significantly, benefiting the 29°C or 30°C outcome contracts.
  • The contract closes at 12:00 UTC on July 22, meaning the final weather data needs to be available and confirmed within that window.

Total volume of $67,049 favors neither side with high conviction. The data right now points to 31°C as a credible central estimate, but the distribution of outcomes across this market’s full outcome set, from 25°C or below all the way to 35°C or higher, means any single temperature bucket carries real uncertainty. The YES side has momentum, but the NO side has probability.

LINES VERDICT

MOMENTUM WITHOUT MAJORITY

The 31°C outcome has the strongest recent price movement in this market, driven by converging weather forecast data. The market has not yet crossed 50%, and the outcome distribution across multiple temperature buckets keeps this genuinely competitive.

What the market says: At 43% implied probability, traders see 31°C as the most likely single outcome but not a sure thing. The contract is volatile, and 18 hours remain before resolution.

Key unknown: The next major weather model run covering Wuhan on July 22 is the single most important data point. If global forecast models converge on 31°C in the next update cycle, this contract will reprice sharply toward 50% or above.

Frequently Asked Questions

Traders currently price a 43% chance that Wuhan's official daily maximum on July 22 lands at exactly 31°C. That leaves a 57% chance any other temperature is recorded.

NO pays out if Wuhan's July 22 maximum is anything other than 31°C. Outcomes like 30°C, 32°C, or 33°C all resolve this specific contract as NO.

A major weather model update in the next 12 hours is the key driver. If global forecast models converge on 31°C as Wuhan's July 22 maximum, YES pricing will surge toward 50% or above.

The contract resolves at 12:00 UTC on July 22, 2026, based on the official recorded daily maximum temperature for Wuhan on that date.

Total volume is $67,049 with $91,246 in liquidity. This is a thin market. A single large trade can move the price significantly before the July 22 close.

We aggregate the live positions of the top 50 Polymarket whales (ranked by 30-day tracked volume) into one composite reading per market. It refreshes every hour. The percentage shows how many of those whales hold YES versus NO; the net dollar position shows the cohort's directional exposure in dollars.

A convergence event fires when three or more tracked wallets buy the same outcome on the same market within a four-hour window. We surface these in the activity feed and the VIP digest.

No. Lines is an editorial and data product. We do not operate prediction markets, custody funds, or accept trades. All trade flows deep-link to Polymarket via our affiliate code. Probabilities shown are market-implied and not predictions or recommendations.

What Could Shift These Probabilities?

Forecast Models Lock In Thirty-One

If the next 12-hour weather model cycle for Wuhan converges tightly on 31°C as the July 22 maximum, traders will push YES above 50%. A persistent low-pressure influence keeping temperatures from rising further would reinforce this outcome. The recent price surge from 0.27 to 0.43 shows the market responds quickly to new forecast data.

Subtropical Ridge Strengthens Overnight

A modest intensification of the Western Pacific subtropical high over central China would push Wuhan's July 22 maximum to 33°C or higher. That outcome resolves this contract NO and collapses the YES price rapidly. Mid-July Wuhan readings above 32°C are historically common, making this the default risk for YES holders.

Cloud Cover Holds the Line at Thirty-One

Partial cloud cover or residual moisture from a nearby weather system could cap Wuhan's maximum right at the 31°C mark. This scenario requires enough atmospheric cooling to prevent the typical afternoon heat spike, while avoiding rainfall that would push the reading below 30°C. A narrow meteorological window, but one forecast models are currently centering on.

Unexpected Rainfall Event Changes Everything

A convective rain event on the morning of July 22 could drive Wuhan's maximum below 30°C, shifting volume to the 29°C or 28°C outcome contracts entirely. This scenario is not reflected in the current market pricing and would catch YES holders off guard. Wuhan's summer convective activity can develop with limited advance warning in short-range forecasts.

Key macro factor: Wuhan's July heat is amplified by the Western Pacific subtropical high, which shifts position throughout the summer and controls whether the Yangtze basin sits under a heat dome or receives cooler, cloudier flow from the east.

Market Timeline

Jul 20, 4:11 AM
Market Created
Jul 20, 4:12 AM
Market Opened
12:00 PM
Market Resolution

Market Comments

Probabilities shown are market-implied and not predictions or recommendations. This content is for informational purposes only.