Highest temperature in Beijing on August 8?

Platform comparison

Market context

Beijing’s highest temperature for 8 August will be set by the Weather Underground observation at Beijing Capital International Airport, not by any broader city forecast or summary high. With the market showing a 0% YES implied probability, the crowd is effectively pricing an outcome below the lower bound of the contract’s temperature range, which is hard to square with the live forecast picture from several weather platforms showing daytime highs around 31–34°C and already near-30°C conditions in the city this morning.[5][9][14]

The historical and cross-platform read is that Beijing in August usually sits in the low-30s Celsius, with travel and weather services clustering around highs of 31–34°C for today and similar values for the month. Forecasts from Weather.com.cn, AccuWeather, HKO and other outlets are broadly aligned on a hot day, which means the main divergence is not between weather models but between the market’s zero-implied price and the external forecast consensus.[4][7][12][14] In previous high-summer Beijing setups, traders usually focus on whether cloud cover, rain timing or an airport-specific observation suppresses the official maximum by a degree or two, rather than on a materially cool outcome.[1][11]

The main catalysts are the airport station’s hourly updates and any afternoon convective cloud or shower activity that could cap the day’s peak before the settlement window closes at 12:00 UTC. Weather Underground currently shows Beijing at 89°F/31.7°C at 8:37 CST, with the broader city forecast still calling for warm, partly cloudy conditions and low precipitation chances, so the key dependency is whether the airport itself records a reading in the upper 20s or low 30s before midday local time.[5][9][10] That leaves sportsbook-style pricing, where available, likely to follow the same hot-day consensus more closely than the market’s present 0% YES line.[5][14]

Sources: 1 · 2 · 3 · 4 · 5

Methodology

This page is a comparison snapshot: one live quote, four reference venues with their key attributes, and a single execution path — every trade button routes to Kalshi vs Polymarket, which mirrors the Polymarket order book directly.

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

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?

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Do I need to KYC for this market?

On Polymarket directly, no — it's wallet-based. Intermediary brokers like Kalshi vs Polymarket trigger KYC only above $1,500 of lifetime trading volume; under that you trade pseudonymously with a single wallet address.