Rolr3 1920x300
Wuhan July 4 High Temp: Can 29°C Hold at 30%?

Wuhan July 4 High Temp: Can 29°C Hold at 30%?

View on Polymarket →
SR Sofia Renard Climate & Science Analyst
Embed this market
Lines Verdict
NO at 68% implied probability

Uncertain, Climatologically Challenging: Wuhan's July climatology runs warmer than 29°C, making this a below-average outcome trading at a fair uncertainty discount. Market probability: 30%.

32% Market Probability
1h +0.0% 24h +0.0% Trend Weak (37/100)
Volume
$7.8K
$7.8K in 24h
Liquidity
$42.2K
Moderate depth
Time Left
2 days
Resolves Jul 4
8K Vol. Jul 4, 2026

Wuhan sits in the Yangtze River valley, a city famous for extreme summer heat. On July 4, the market is asking a precise question: does the daily high land exactly at 29°C? That single-degree target is trading at 30% implied probability. The market has priced this as uncertain, not settled, and the momentum signal says something shifted in the last 24 hours.

The market question asks: what is the highest temperature in Wuhan on July 4, 2026? The 29°C outcome trades at a YES price of $0.30 and a NO price of $0.70. The market resolves on July 4, 2026, at 12:00 UTC. Total volume stands at $7,321, with $7,326 in 24-hour volume, suggesting most of this market’s activity opened today.

How This Contract Works: One Degree, One Outcome

YES pays out if Wuhan’s official daily high temperature on July 4 registers exactly 29°C. NO covers every other outcome, including all temperatures above and below that mark. Resolution uses standard meteorological data from official Chinese weather monitoring sources. Eleven competing outcome contracts exist, ranging from 23°C or below up to 33°C or higher.

  • YES (29°C): $0.30, implying a 30% probability
  • NO (all other outcomes): $0.70, implying a 70% probability

The NO position wins across a wide range. Wuhan’s July temperatures average in the low-to-mid 30s Celsius historically, which means cooler outcomes like 29°C face a structural headwind from climatology. A 29°C high in early July Wuhan is possible but below the historical norm. The path to NO paying out runs through almost any other temperature on the board.

Sponsored Partner
ROLRROLR

Momentum and Market Signals: A Sharp Morning Move

The momentum composite tells a clear story. The trend score sits at 41.25, the 1-hour price change shows a 3.5% gain, and the market opened today at a significantly lower price before climbing. Taken together, these signals point to fresh capital entering the YES side this morning, likely tied to updated short-range weather model runs that showed cooling relative to earlier forecasts.

Total volume is $7,321. Liquidity is $36,210, a relatively healthy depth for a single-day weather market. Volume under $1M means price can move sharply on any new weather data or forecast update. The 24-hour volume matches total volume almost exactly, confirming this market is essentially brand new and all activity is recent.

  • The 1-hour gain of 3.5% on top of an 8% jump on July 2 shows the 29°C contract has gained significant ground from its opening price, reflecting updated forecast data favoring a cooler July 4.
  • Trader sentiment reads strongly bearish on YES: 30% YES versus 70% NO. The broader market still expects a temperature other than 29°C.
  • Liquidity at $36,210 gives this contract reasonable depth for a short-duration weather market, but thin total volume means a single large bet could move the price quickly.
  • Open interest at $0 is notable. It suggests positions may be settling or this is the initial funding phase. Monitor for open interest building as July 4 approaches.
  • The 30-day low was $0.18, and the contract now trades at $0.30. The entire price appreciation has happened in the last 48 hours.

Lines Analysis: What the Weather Data Says About Wuhan on July Fourth

Wuhan’s climatological record makes 29°C a below-average outcome for early July. The city sits in China’s Jiangnan region and regularly records highs in the 33°C to 36°C range during peak summer. For 29°C to resolve YES, Wuhan would need a cooling event, a persistent cloud cover, or a weather system pushing through the region on that specific day. Short-range numerical weather prediction models run 72 to 96 hours out and would now cover July 4 with reasonable skill. The morning price move suggests at least one of those models updated in a direction that favors cooler temperatures.

The competing outcomes tell a different story. The 30°C, 31°C, 32°C, and 33°C-or-higher contracts collectively represent the climatological baseline. If Wuhan runs at its July average, the YES contract on 29°C misses. The specific threat to this contract isn’t extreme heat or extreme cold. It’s a temperature landing one degree in either direction, at 28°C or 30°C, which shifts the payout entirely. Here’s what the measurements are telling us: the market is pricing a narrow band with real uncertainty on both sides.

  • China Meteorological Administration forecasts for Wuhan covering July 4 will be the single most important data point before resolution. Any update showing temperatures trending above 30°C would pressure the YES price sharply.
  • Synoptic weather pattern updates, including any subtropical high-pressure ridge position over central China, directly affect peak daytime temperature and would reprice the contract.
  • The 28°C and 30°C contracts on this same market will act as a proxy for where competing capital is flowing. Watch their prices as a directional indicator.
  • Morning high-resolution model runs from European and American forecast centers covering July 3 to 5 would give the clearest signal on where the peak lands.

Total volume at $7,321 is thin. The data doesn’t care about the politics, and in this case the data is meteorological. The current 30% probability reflects genuine forecaster uncertainty about a specific temperature bucket in a specific city on a specific day. The market is pricing uncertainty, not science, and that uncertainty is real.

LINES VERDICT

Uncertain, Climatologically Challenging

Wuhan’s July climatology runs warmer than 29°C, and the YES contract sits at a one-in-three probability for a reason. The recent price climb reflects updated short-range forecast data, not a shift in long-run climate expectations.

What the market says: At 30% implied probability, the market calls this unlikely but not dismissible. Volume is thin, which means any updated weather model run between now and July 4 could shift the price sharply in either direction.

Key unknown: The China Meteorological Administration’s next forecast update covering July 4 is the pivotal data point. A model run showing Wuhan temperatures settling at 30°C or higher would push the YES price back toward its opening levels quickly.

Frequently Asked Questions

It means the market estimates a roughly one-in-three chance Wuhan's official daily high lands exactly at 29°C on July 4. Ten other temperature outcomes compete for the remaining probability.

NO pays out if Wuhan's July 4 high is anything other than 29°C, including 28°C, 30°C, 31°C, 32°C, 33°C or higher, or any cooler outcome. NO covers ten competing temperature buckets.

Updated short-range weather model runs from the China Meteorological Administration covering July 4 are the primary price driver. Any forecast shift toward 30°C or higher would pressure YES sharply lower.

The market resolves on July 4, 2026, at 12:00 UTC, using official meteorological temperature data for Wuhan's daily high.

Total volume is $7,321, which is thin. Liquidity at $36,210 provides some depth, but low volume means a single large bet can move the price significantly before resolution.

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?

Cooling System Moves Through Central China

A synoptic weather system or persistent cloud cover arriving over Wuhan on July 3 suppresses the July 4 peak to the 29°C range. Short-range models converge on this temperature, capital flows into the YES contract, and the probability pushes above 40%. The contract's thin volume amplifies any directional move.

Subtropical High Locks In Summer Heat

China's subtropical high-pressure ridge builds over the Yangtze valley through July 4, driving Wuhan's daily high to 32°C or above. Updated China Meteorological Administration forecasts show this clearly, capital exits the 29°C contract, and the YES price falls back toward its opening level near $0.18.

Models Split, Uncertainty Holds Price

European and American forecast models disagree on the July 4 temperature by two to three degrees, keeping genuine uncertainty alive through July 3. The 29°C contract holds its ground near 30% as traders on both sides wait for the final model run. Resolution becomes a coin flip between adjacent degree buckets.

Unexpected Precipitation Event Dramatically Cools the Day

An unforecast convective system or heavy rainfall event hits Wuhan on July 4 morning, suppressing temperatures to 26°C or below. Both the 29°C YES contract and the nearby temperature buckets reprice rapidly. This outcome benefits cooler temperature contracts and destroys probability in the 29°C to 33°C range simultaneously.

Key macro factor: Wuhan's July 2026 temperatures are influenced by the position and intensity of the Western Pacific subtropical high, which drives heat waves across central and eastern China during peak summer and has trended stronger in recent El Nino-influenced years.

Market Timeline

4:02 AM
Market Created
4:03 AM
Market Opened
Saturday, Jul 4
Market Resolution

Market Comments

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