Highest temperature in Guangzhou on July 7?

Platform comparison

Market context

Guangzhou in early July routinely experiences intense heat, with daily highs often climbing into the mid-thirties Celsius, yet the current market shows a 0% probability for a specific temperature range. In prediction markets, a YES share pays out if the event occurs, while a NO share wins if it does not; here, the crowd believes the exact temperature band in question is virtually impossible, likely because the range is too narrow or misaligned with typical peaks. Historical data confirms July is Guangzhou’s hottest month, with average highs around 33°C and peaks occasionally reaching 39°C, meaning the structural probability of landing in one precise bucket among eleven is inherently low, regardless of how hot the day becomes.

Traders should monitor real-time weather model updates and official announcements from China’s meteorological bureau, as sudden shifts in forecasted cloud cover or rainfall can alter the daily high. Recent reports note this summer has seen record heat across southern China, with July’s average temperature hitting 23.3°C—the highest since 1961—suggesting extreme conditions are possible, though the specific range remains unlikely. The settlement window ends on 7 July 2026 at 12:00 UTC, and resolution relies on Wunderground’s recorded daily high at Guangzhou Baiyun International Airport Station. Watch for thunderstorm forecasts, as heavy rain can suppress temperatures below expected highs, further reducing the chance of the target range being hit.

Sources: 1 · 2 · 3 · 4 · 5

Methodology

Methodologically we separate two layers: the live probability (Polymarket mid-price) and the platform attributes (fee, KYC, settlement currency, payment rails). That keeps the comparison honest — a single canonical probability across the row, with the venue-by-venue trade-offs spelt out in the columns next to it.

Resolution & payout

At resolution the UMA oracle takes over: a proposer posts the outcome with a bond, any token holder can dispute within two hours. Without dispute the result is accepted and the smart contract distributes USDC instantly.

On Kalshi (CFTC-regulated) resolution runs through their in-house clearing engine in USD. Betfair Exchange settles after match end in the account's local currency. Manifold pays no cash — only its in-platform "mana" currency.

FAQ

Is this market available outside the US?

Polymarket itself is geo-blocked in the US/UK/EU. Always check the legal status of prediction markets in your jurisdiction before trading.

How does resolution work?

Through the UMA Optimistic Oracle on Polygon: a proposer submits the outcome, a two-hour challenge window opens, and USDC payouts settle automatically once the result is final.

What's the difference between YES and NO shares?

A YES share pays $1.00 if the event happens, $0 otherwise. A NO share pays $1.00 if the event doesn't happen. The market price between 0¢ and 100¢ is the implied probability.

Do I need to KYC for this market?

On Polymarket directly, no — it's wallet-based. Intermediary brokers like Prediction Market UK trigger KYC only above $1,500 of lifetime trading volume; under that you trade pseudonymously with a single wallet address.

How reliable are the quoted odds?

The YES/NO percentages are the live mid-prices of the Polymarket order book. On deep markets they move every few seconds; on thinner ones you'll see short plateaus.