Highest temperature in Guangzhou on July 6?

Platform comparison

Market context

The underlying event is the daily peak temperature recorded at Guangzhou Baiyun International Airport on 6 July 2026, with the market currently pricing a 32°C high at 0% YES. This near-zero implied probability suggests the consensus expects a significantly cooler day, yet historical data frames July as Guangzhou’s hottest month, averaging 28.3°C with daily highs frequently reaching 31–34°C [4]. Recent Polymarket activity for 4 July shows a 34% probability for 32°C, while UK Met Office forecasts for that date pointed to 31°C, indicating that 30–32°C is a clustered, realistic range rather than an outlier [1]. The 0% figure appears to be an underdog spot, potentially misreading the seasonal trend where extreme hot days (above 33°C) have doubled since the 1960s across East Asia [3].

Traders should monitor the UK Met Office’s updated July 6 forecast and any local heatwave advisories, as recent records show China experienced its hottest July since 1961, with Guangzhou seeing its longest summer period in the same timeframe [6][7]. The resolution depends entirely on Wunderground’s final daily high for the airport station, which captures the absolute peak across all times on 6 July. Given the rising frequency of extreme heat and the current 32°C market being priced as impossible, the value likely sits contrarian to the consensus, favouring the underdog 32°C outcome if the seasonal heatwave persists. The 0% price offers a stark value spot against the historical reality of July’s thermal intensity.

Sources: 1 · 2 · 3 · 4 · 5

Methodology

We track Highest temperature in Guangzhou on July 6? across the five venues with material prediction-market liquidity. The probability shown is the live Polymarket mid; the comparison rows summarise how each venue treats the underlying contract — fees, KYC thresholds, settlement currency, deposit options. The highlighted row marks the cheapest route into Polymarket's order book.

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 Who Will Win. Kalshi charges up to 7% per trade; Betfair Exchange takes 2-5% commission on net winnings.

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.

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.