Pronóstico: Highest temperature in Guangzhou on July 23?

Platform comparison

Market context

Polymarket is currently pricing the Guangzhou airport temperature contract with **36°C** as the frontrunner at **47%**, ahead of **35°C** at **28%**, so the market is leaning towards another very hot afternoon rather than an outlier spike or a cooler-than-normal reading.[1] For a holder of conditional tokens on Polygon, that means the payoff still hinges on the single Wunderground daily high recorded at Guangzhou Baiyun International Airport by the settlement cutoff, with USDC at stake only if the final observed maximum lands inside the selected range.[1]

The current read sits against a July climate backdrop that already favours high daily maxima: Guangzhou’s typical July high is about **32°C**, with lows near **25°C**, so the market is effectively asking whether today runs several degrees above the seasonal norm.[3] A 0% crowd-implied chance for “YES” on the broad outcome would be inconsistent with the live pricing on the individual temperature bands, which suggests traders are not treating the event as impossible but as a distribution problem across adjacent ranges rather than a binary weather call.[1][3]

For traders, the main catalysts are the intraday evolution of heat, cloud cover, rainfall and wind at the airport station, because the settlement source is the day’s highest recorded temperature rather than a forecast headline.[1] Early-morning conditions are already hot, with Guangzhou reporting 91°F and a RealFeel of 109°F, which supports the idea that the day has a credible path to the upper-30s Celsius if heating continues under humid conditions.[2] That makes late-afternoon observations and any shift in local convective activity the key dependencies to watch before the Wunderground daily high is locked in.[1][2]

Sources: 1 · 2 · 3

Methodology

This page reviews Pronóstico: Highest temperature in Guangzhou on July 23? across five venues. The live probability is the Polymarket mid-price, sourced directly from the on-chain Polygon order book; the comparison columns benchmark each venue on fee structure, KYC, settlement currency and payment rails. Every CTA routes to Polymarket Qué Es, which mirrors the Polymarket order book at 0% fees.

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

Where can I trade this market with the lowest fees?

Polymarket is geo-blocked in the US/UK/EU. The easiest 0%-fee broker into the same order book is Polymarket Qué Es. Kalshi charges up to 7% per trade; Betfair Exchange takes 2-5% commission on net winnings.

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.

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.

What does Polymarket cost to trade?

Polymarket itself charges 0% — the only cost is the Polygon network fee, typically under $0.01 per transaction. Off-chain venues like Kalshi or Betfair charge 2-7% commission.

How fast are USDC deposits?

Polygon credits deposits after 12 confirmations — usually under 30 seconds. Withdrawals follow the same path and land back in your wallet within minutes.