Highest temperature in Beijing on August 3?

Platform comparison

Market context

Beijing’s airport temperature on 3 August will be judged by the **daily high at Beijing Capital International Airport Station**, settled in **USDC** through the market’s on-chain contract, so the key question is whether the afternoon reading lands in the contract’s chosen Celsius band. Early-August Beijing is usually hot and humid, with climatological highs around 30–31°C, and multiple forecast sources for 3 August 2026 point to temperatures in the low-to-mid 30s Celsius rather than anything extreme.[5][14][15]

That is why the current **0% YES** looks like a pricing artefact rather than a clean signal about the weather itself. Comparable Beijing August days often resolve in a narrow range, but forecasts still leave room for a degree or two of spread if showers arrive early or convection is delayed; published outlooks for 3 August 2026 span roughly 32–37°C, with some sources also flagging thunderstorms or humid cloud cover that could cap the peak.[2][3][6] For a range contract, the exact band matters more than the headline “hot” forecast, so traders usually focus on whether the day can clear the next threshold above the prevailing consensus.

The main catalysts are the updated city and airport forecasts, plus any late-shifting rain or thunderstorm timing that changes peak heating before the settlement window closes at 12:00 UTC. Beijing forecasts commonly emphasise high humidity and a non-trivial rain chance in August, and official or quasi-official bulletins can move quickly when convective systems are adjusted late.[3][16] In crypto terms, the market is a straightforward USDC settlement on a weather print, so broader BTC or ETH moves matter mainly through risk appetite, not because they affect the underlying temperature.

Sources: 1 · 2 · 3 · 4 · 5

Methodology

Methodologically this overview focuses on on-chain pricing: Polymarket's live mid comes from the Polygon conditional-token order book and settles automatically in USDC. The other three venues — Kalshi, Betfair, Manifold — sit alongside as off-chain reference points so you can see how the contract translates across regulatory and settlement regimes.

Resolution & payout

Settlement is on-chain via UMA Optimistic Oracle. A proposer posts the outcome with a bond, a two-hour dispute window opens, then the smart contract lifts winning conditional tokens to 1 USDC and sends payments to holders' wallets automatically. No withdrawal fees beyond Polygon gas.

Off-chain venues (Kalshi, Betfair, Smarkets) settle in local fiat through bank-side clearing — faster than SWIFT, slower than on-chain. Manifold pays no real cash.

FAQ

What are crypto prediction markets?

Crypto prediction markets are on-chain smart contracts where you buy YES or NO shares on a future crypto event (e.g. "BTC above $100k by year-end"). The market price between 0¢ and 100¢ is the implied probability.

Why USDC and not ETH or USDT?

USDC is the Polygon standard — audited reserves (Circle, monthly attestation), deepest order book, low gas costs. ETH volatility would distort probability quotes; USDT has thinner Polygon liquidity than USDC.

How does UMA secure the resolution?

The UMA Optimistic Oracle uses a bond system: a proposer posts a bond, a two-hour challenge window opens. On dispute the losing side forfeits the bond — financial incentive for honest resolution.

Which crypto markets exist on Polymarket?

Currently active markets include BTC/ETH/SOL price targets, halving dates, ETF approvals, hard-fork outcomes and Layer-2 TVL thresholds. The list updates weekly; biggest volume sits on BTC and ETH price forecasts.

Are crypto prediction markets taxable in the US?

In the US, prediction market gains are typically treated as ordinary income or short-term capital gains depending on holding period. Consult a tax professional for your specific situation — we cannot provide tax advice.