Highest temperature in Guangzhou on July 1?

Platform comparison

Market context

On 1 July 2026, the real-world event determining this market is the peak temperature recorded at Guangzhou Baiyun International Airport, with the crowd currently assigning a 0% probability to the “YES” outcome. Historically, July in Guangzhou is consistently scorching: daily highs average around 33°C (91°F), rarely dipping below 29°C (85°F) and occasionally reaching 36°C (96.8°F). Notably, the highest temperature ever recorded in Guangzhou—39.1°C—occurred precisely on 1 July 2004, suggesting that extreme heat on this date is not unprecedented. While the consensus leans heavily against any record-breaking spike this year, the historical precedent implies that dismissing the possibility entirely may overlook latent value.

Traders should monitor upcoming weather forecasts and regional climate announcements, particularly those tied to China’s national heatwave patterns. Reuters recently reported that China experienced its hottest month in recent history in July 2024, with average temperatures eclipsing previous records since 1961, indicating a trend toward intensifying summer heat. If similar conditions recur in 2026, the contrarian angle of betting on an outlier high temperature could become compelling. The key dependency is whether monsoon activity or cloud cover suppresses peak temperatures; absent significant suppression, the underdog scenario of a 39°C+ day remains plausible despite current market pricing.

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Methodology

This page reviews Highest temperature in Guangzhou on July 1? 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 Who Will Win, which mirrors the Polymarket order book at 0% fees.

Resolution & payout

Polymarket-based markets settle through the UMA Optimistic Oracle on Polygon. A proposer submits the outcome, a two-hour challenge window opens, and unchallenged proposals finalise the resolution. Payouts settle automatically in USDC the moment the result is final — no bookmaker, no delay.

Kalshi-based markets settle in USD via the CFTC-regulated clearinghouse. Betfair Exchange settles in GBP/EUR net of commission. Manifold is play-money and does not pay out real funds.

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 Who Will Win. 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.

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.

Do I need to KYC for this market?

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