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Guangzhou July 7 Peak Temp: Can 31°C Hit?

Guangzhou July 7 Peak Temp: Can 31°C Hit?

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SR Sofia Renard Climate & Science Analyst
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Lines Verdict
NO at 68% implied probability

LEAN NO: Guangzhou's July climatology skews above 31°C, and exact-degree resolution requires precise weather conditions. Market probability: 31.5%.

32% Market Probability
1h +2.0% 24h +4.0% Trend Weak (42/100)
Volume
$12.3K
$7.9K in 24h
Liquidity
$45.3K
Moderate depth
Time Left
1 day
Resolves Jul 7
12K Vol. Jul 7, 2026

Guangzhou sits in the Pearl River Delta, one of the most climatically volatile urban corridors in southern China. On July 5, the market pricing the city’s July 7 peak temperature at 31°C jumped sharply, climbing 6.5% in a single hour. That move pushed the contract to a 31.5% implied probability, making 31°C the single most-traded outcome in a field that spans from 25°C or below all the way to 35°C or higher.

The market question is straightforward: will Guangzhou’s highest temperature on July 7 land exactly at 31°C? The YES contract trades at 0.32 and the NO contract at 0.69. The market closes July 7 at 12:00 UTC. Total volume sits at $2,204, all of it moved in the last 24 hours. Here’s what the measurements are telling us: this is a thin, fast-moving market where a single weather data update can reprice the whole contract.

How the Guangzhou July 7 Temperature Contract Works

This contract resolves YES if Guangzhou’s recorded peak temperature on July 7 equals exactly 31°C. Any other reading, whether 30°C, 32°C, or anything outside that band, resolves the contract NO. Resolution follows the market’s designated weather data source. Traders are not betting on a range. They are betting on a single degree reading.

  • YES (0.32): Guangzhou records a peak of exactly 31°C on July 7.
  • NO (0.69): Guangzhou records any temperature other than 31°C as its July 7 peak.

The NO outcome covers every other scenario. Guangzhou’s July climatology typically puts daily highs between 32°C and 36°C during peak summer heat. A reading of 31°C would represent a slightly cooler day relative to historical July norms for the city. Weather systems moving through Guangdong province on July 6 or 7 could push temperatures either above or below that mark. The data doesn’t care about the politics of which direction traders prefer.

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Momentum and Market Signals for the July 7 Outcome

The 1-hour price jump of 6.5% on July 5 is the dominant momentum signal here. Combined with a trend score of 52.77, which sits just above neutral, the move suggests a reaction to an updated weather forecast rather than sustained conviction. No 24-hour comparison is available, which limits the read on whether this momentum has legs.

Total volume is $2,204, and all of it moved in the last 24 hours. Liquidity stands at $17,312, which is healthy relative to volume. But at under $1M in trading activity, this market is thin. A single large trade or a fresh National Meteorological Center forecast for Guangzhou could move the YES price several percentage points in minutes. The market is pricing uncertainty, not science.

  • The 1-hour surge of 6.5% signals a weather forecast update likely triggered a re-evaluation of the 31°C outcome’s probability.
  • The 1-hour price change is the only directional signal available; no 24-hour trend confirms or contradicts the move.
  • Liquidity of $17,312 provides a reasonable buffer, but total volume below $1M means sharp moves remain possible on any new data.
  • Trader sentiment reads strongly bearish on YES at 31.5%, meaning the market collectively leans toward a temperature miss in either direction.
  • The trend score of 52.77 sits near neutral, suggesting the recent price jump has not yet built into a sustained directional move.

Lines Analysis: Guangzhou Temperature Thresholds

What supports the YES outcome is Guangzhou’s seasonal variability. July in the Pearl River Delta regularly produces temperature swings driven by tropical moisture, cloud cover from afternoon convection, and regional weather systems. A 31°C peak is plausible on a day when cloud cover suppresses the usual solar heating. If a weak tropical disturbance or persistent overcast reduces the daytime high from Guangzhou’s typical July range of 33°C to 35°C, the 31°C mark comes into play.

What makes YES difficult is precision. This contract does not resolve YES for 30°C or 32°C. It requires an exact match. Guangzhou’s July climatology skews warmer than 31°C on most days. A meaningful rainfall event or sustained cloud cover would need to hold temperatures down to that specific level, not merely reduce them from a 35°C peak. That single-degree precision is the primary structural barrier to YES resolution.

  • China Meteorological Administration forecasts for Guangdong province on July 6 and 7 are the single most important data point to watch.
  • Any tropical disturbance or Mei-yu front remnant moving through Guangdong before July 7 would push daily highs lower and favor YES.
  • A clear, high-pressure day on July 7 would push Guangzhou’s peak well above 31°C, resolving NO decisively.
  • The exact measurement methodology and reporting station used for resolution matters here. Different stations in the Guangzhou metro record different peaks.
  • Regional humidity and afternoon storm timing can cap or extend daily highs by one to two degrees, making precision forecasting difficult within 48 hours.

Total volume of $2,204 confirms this is a niche weather market, not a deeply liquid contract. The data currently favors the NO side by a wide margin, with the market pricing a 68.5% probability that Guangzhou’s July 7 peak lands somewhere other than 31°C. That reflects both the precision required and the historical tendency for July days in the city to run warmer than 31°C.

LEAN NO

Guangzhou’s July climatology runs warmer than 31°C on most summer days, and hitting an exact-degree resolution requires both a meaningful temperature suppression event and a precise landing point that leaves no room for rounding. The single-degree precision requirement makes YES structurally difficult even when weather conditions trend cooler.

What the market says: At 31.5% implied probability, the market has priced 31°C as a plausible but minority outcome. With less than 48 hours to resolution and under $2,500 in total volume, this contract can move sharply on a single updated forecast from China Meteorological Administration before July 7.

Key unknown: The China Meteorological Administration’s updated forecast for Guangzhou on July 6 is the single data point that will reprice this contract. Any forecast showing a cloud-driven or storm-driven cooldown to the low 30s would immediately challenge the current NO lean.

Frequently Asked Questions

It means the market estimates a roughly one-in-three chance Guangzhou's July 7 peak hits exactly 31°C. Two-in-three traders expect a different temperature reading to resolve the contract NO.

NO resolves YES if Guangzhou's recorded peak on July 7 is anything other than exactly 31°C. That includes 30°C, 32°C, or any other reading in the full temperature range.

A China Meteorological Administration forecast showing Guangzhou's July 7 high in the low 30s, driven by storm activity or cloud cover, would push the YES contract sharply higher within hours.

The market closes July 7, 2026 at 12:00 UTC. Resolution depends on the official peak temperature recorded for Guangzhou on that date.

Volume below $1M signals a thin market. The 0.32 YES price can shift several points on a single trade or new forecast. Liquidity of $17,312 provides some buffer but does not guarantee stability.

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?

Storm System Caps Guangzhou High at 31°C

A tropical moisture surge or Mei-yu front remnant moves through Guangdong on July 6, bringing sustained cloud cover and afternoon precipitation. Guangzhou's daytime peak stalls at exactly 31°C. The China Meteorological Administration confirms the reading, and the YES contract resolves. The 1-hour momentum surge on July 5 would prove to have been the leading signal.

Clear High-Pressure Day Pushes Temps to Mid-Thirties

A high-pressure ridge builds over Guangdong, delivering full sun and low humidity on July 7. Guangzhou's peak climbs to 33°C or higher, resolving the contract firmly NO. This scenario aligns with the city's most common July weather pattern and the market's current 68.5% NO lean. The YES contract expires worthless.

Forecast Update Narrows Temperature Band to Low Thirties

China Meteorological Administration releases a July 6 forecast placing Guangzhou's July 7 high between 30°C and 32°C. Uncertainty around cloud cover timing makes 31°C plausible. YES buyers return, pushing the contract from 0.32 toward 0.45 or higher. The thin order book amplifies the move. Resolution still depends on the exact recorded peak.

Measurement Station Discrepancy Triggers Dispute

Different Guangzhou metro weather stations record peaks ranging from 30°C to 32°C on July 7 due to urban heat island variation and storm cell positioning. The resolution source's designated station becomes critical. If the official station records exactly 31°C while others show 32°C, YES resolves. Station selection adds a layer of uncertainty beyond the forecast itself.

Key macro factor: Southern China's early July weather is influenced by the East Asian summer monsoon, with Guangdong province subject to tropical moisture surges and afternoon convective storms that can suppress daily highs by two to four degrees relative to clear-sky conditions.

Market Timeline

Jul 5, 4:04 AM
Market Created
Jul 5, 4:04 AM
Market Opened
Tuesday, Jul 7
Market Resolution

Market Comments

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