Highest temperature in Beijing on July 10?

Platform comparison

Market context

Beijing’s highest temperature on 10 July 2026 will be recorded at the Beijing Capital International Airport Station, with settlement based on Wunderground’s daily maximum in degrees Celsius. The market currently prices a 100% YES probability that the temperature will fall within its implied range, a stance that diverges sharply from Lines.com, where the 29°C threshold trades at just 26.5% [9]. This gap between prediction-market certainty and sportsbook-style pricing suggests either a misaligned range definition or thin liquidity distorting the implied probability.

Historical data shows Beijing’s 10 July highs typically average 31°C, with recorded extremes reaching 37°C in 1959 and 40°C on 11 July 2001 [4]. While July 2023 saw temperatures hit 40°C and 2024 marked China’s hottest month in recent history, those peaks occurred later in the month or in different years [1][8]. The all-time record of 41.9°C was set on 24 July 1999, indicating that mid-July heatwaves are possible but not guaranteed to breach extreme thresholds [2].

Traders should monitor daily Wunderground updates for the ZBAA station and any official heat advisories from Chinese meteorological authorities, which have previously urged outdoor limits during extreme heat [2]. With settlement ending at noon UTC on 10 July 2026, real-time temperature feeds and regional forecast adjustments will be the primary catalysts. The convergence of climatology, thin volume, and forecast risk ahead of resolution makes this contract a high-sensitivity cross-platform odds comparison [9].

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 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.

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.