Highest temperature in Beijing on July 6?

Platform comparison

Market context

The underlying event is the peak daytime heat at Beijing Capital International Airport on 6 July 2026, where the market currently prices a 0% chance for the "YES" outcome, implying the crowd believes the temperature will not hit the specified threshold. Historical data frames this probability with stark clarity: July is Beijing’s hottest month, with daily highs averaging 88°F (31°C) and rarely dipping below 78°F (26°C) [3]. Recent years show extreme volatility, with 2023 reaching 40°C (104°F) in the southern suburb and 2024 marking China’s hottest month since records began in 1961 [2][5]. The consensus leans heavily toward 34°C as the frontrunner at 43%, with 33°C as the next closest at 36%, suggesting traders expect a standard but intense summer day rather than a record-breaker [1].

For value spots, a contrarian angle might sit in the 33°C range if monsoon clouds or a sudden heatwave shift disrupt the typical dry pattern, though the 0% YES price implies the market sees no risk of exceeding the threshold. Traders should watch the National Meteorological Centre’s daily forecast for Beijing, particularly any announcements on incoming rain or heatwave extensions, as these dependencies directly influence peak temperatures [6]. Recent reports confirm China recorded an average of 4.1 days exceeding 35°C in 2023, the highest in six decades, indicating that extreme heat is a recurring catalyst [6]. With settlement ending 2026-07-06T12:00:00Z, the focus remains on whether the airport station will match the southern suburb’s 40°C spike or settle near the 33–34°C average, where the real value may hide if the crowd overreacts to the 0% YES pricing.

Sources: 1 · 2 · 3 · 4 · 5

Methodology

Methodologically we separate two layers: the live probability (Polymarket mid-price) and the platform attributes (fee, KYC, settlement currency, payment rails). That keeps the comparison honest — a single canonical probability across the row, with the venue-by-venue trade-offs spelt out in the columns next to it.

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 2026. Kalshi charges up to 7% per trade; Betfair Exchange takes 2-5% commission on net winnings.

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 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.

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.