Highest temperature in Beijing on July 23?

Platform comparison

Market context

Beijing Capital International Airport’s highest temperature on 23 July will be fixed from the station’s published daily history page, with the market remaining open to revisions until the first datapoint for 24 July is posted. The current crowd view is clustered around the upper-20s Celsius, with the leading bands near 28°C and 27°C, which implies traders are pricing a fairly ordinary midsummer afternoon rather than an extreme heat spike.[1]

That distribution fits the broader seasonal profile for Beijing in late July, when temperatures often sit in the high 20s to low 30s but are still sensitive to cloud cover, rain timing, and post-rain humidity. In practice, markets like this tend to narrow as the day progresses because the settlement source is a single airport station reading, so a morning forecast can be less informative than the actual evolution of cloud and convection around the capital.[1]

For traders, the main catalysts are local weather updates, any shift in radar or rainfall forecasts over northern China, and the exact time the station prints its final daily maximum. On the crypto side, this is a USDC-settled event, so the relevant microstructure is mainly market sentiment, with broader BTC and ETH volatility usually only mattering if it changes risk appetite across prediction markets. The current 0% YES pricing suggests an outlier book state rather than a view that Beijing cannot reach the listed ranges, so late revisions in the forecast or a delayed hot spell could matter more than crypto beta itself.[1]

Sources: 1

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.

Can I use Bitcoin directly?

No, Polymarket operates exclusively in USDC on Polygon. You can bridge BTC to USDC via an exchange or bridge service and deposit on Polygon — typically 10-30 minutes processing time.

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.