Highest temperature in Guangzhou on July 7?

Platform comparison

Market context

The underlying event is the peak temperature recorded at Guangzhou Baiyun International Airport on 7 July 2026, a date that falls squarely within the city’s hottest month. Historical data shows July highs in Guangzhou typically hover around 32–33°C, rarely dipping below 29°C or exceeding 36°C, with 91°F (32.8°C) as the average daily high. This context frames the current 0% YES implied probability for a specific temperature range as structurally narrow: the market is not betting on whether Guangzhou will be hot, but on whether the peak lands in one precise bucket among eleven competing outcomes.

Comparable cases from recent years, including the 2026 heatwave that made July the hottest since 1961, show that while temperatures can spike to 35°C or 36°C, they rarely settle exactly on a single value like 34°C. Traders should monitor daily forecast model runs from China’s National Meteorological Center and real-time updates from Wunderground, especially as thunderstorm activity—common in July—can suppress peak temperatures. A recent report from People’s Daily confirms that Guangzhou is experiencing record summer days, but the structural probability math, not the heat forecast alone, keeps precise-range contracts near low odds.

Divergence between platforms is notable: Lines.com prices a 34°C peak at 27.5% for 3 July, while Polymarket assigns 25% to the same outcome, suggesting cross-platform odds-comparison traders may find value in the slight discrepancy. Analyst consensus remains that Guangzhou will be hot, but the 0% YES probability for 7 July reflects the market’s view that the exact range is unlikely to hit, not that the day will be cool. The settlement window ends 12:00 UTC on 7 July, leaving little time for late-model adjustments to shift odds significantly.

Sources: 1 · 2 · 3 · 4 · 5

Methodology

We track Highest temperature in Guangzhou on July 7? 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

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.

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.

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.