Highest temperature in Guangzhou on July 7?

Platform comparison

Market context

The underlying real-world event is the highest temperature recorded at Guangzhou Baiyun International Airport on 7 July 2026, measured in degrees Celsius. Polymarket prices this contract today at 0% for the YES outcome, implying the crowd believes the temperature will not fall within the specific range being wagered on. This stark pricing contrasts with historical July data, where daily highs typically hover around 32–33°C, rarely dropping below 29°C or exceeding 36°C. Recent market activity on a similar July 3 contract showed a 27.5% probability for a 34°C peak, suggesting that while extreme heat is possible, the current 0% valuation for this specific range may reflect a narrow definition of the range rather than a belief in cold weather.

Traders should monitor the official weather schedule from Wunderground, which will release the definitive high temperature for the day, and watch for any announcements regarding heatwave advisories from Chinese meteorological authorities. Recent reports indicate that Guangzhou has experienced its longest summer since 1961, with July averaging 23.3°C, a record high since 1961, which could influence temperature volatility. On-chain mechanics remain straightforward: USDC settles on Polygon via conditional tokens, meaning liquidity flows directly based on the final Wunderground reading. The settlement window ends 2026-07-07T12:00:00Z, so the market will resolve immediately once the data is confirmed, leaving no room for late adjustments. The dependency on a single data source from Wunderground means any delay or anomaly in their reporting could temporarily stall resolution, though the final outcome remains binding.

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Methodology

This page reviews Highest temperature in Guangzhou on July 7? 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 PolyGram, 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 PolyGram. 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.

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.

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 PolyGram trigger KYC only above $1,500 of lifetime trading volume; under that you trade pseudonymously with a single wallet address.