Highest temperature in Beijing on July 14?

Platform comparison

Market context

Beijing's highest temperature on 14 July 2026 will be recorded at the Capital International Airport Station and resolved against Wunderground historical data. The market currently shows 0% implied probability across all temperature ranges, suggesting either a data-feed issue or extreme illiquidity preventing price discovery. July in Beijing typically sees daily highs between 29–34°C, with occasional peaks above 35°C during heat waves. The settlement window closes at midday UTC on the resolution date, creating a narrow window for final trades after the day's maximum temperature is recorded.

Historical patterns from Beijing's meteorological records indicate that mid-July temperatures cluster around 31–33°C in typical years, though the city experienced a sustained heatwave in July 2022 with highs reaching 40°C. The 2020 and 2021 July records show more moderate peaks near 32–34°C. Current climate data from the China Meteorological Administration suggests 2026 will track within normal seasonal bounds absent a major atmospheric anomaly. The absence of any meaningful odds across prediction markets contrasts sharply with sportsbook indifference; traditional weather forecasting services do not publish odds for specific temperature ranges, making cross-platform comparison impossible at this stage.

Traders should monitor extended-range forecasts from the European Centre for Medium-Range Weather Forecasts and the China Meteorological Administration as July 2026 approaches. Any significant tropical cyclone activity in the western Pacific or unusual high-pressure systems over northern China would shift expectations materially. The 0% reading suggests the market has not yet attracted sufficient liquidity to establish baseline pricing; early movers will face wide spreads.

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

Settlement runs on-chain. Polymarket's contract logic separates YES and NO shares as conditional tokens; at resolution the winning share lifts to $1.00 and the losing one to $0. The outcome input comes from the UMA Optimistic Oracle, which secures against bad resolution with a bond + dispute window.

Once finalised, the smart contract pays USDC to the holders' wallets within minutes — no withdrawal fees beyond Polygon network gas. Kalshi settles in USD via CFTC clearance, Betfair in account currency net of commission, Manifold in play-money mana with no cash-out.

FAQ

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's the difference between YES and NO shares?

A YES share pays $1.00 if the event happens, $0 otherwise. A NO share pays $1.00 if the event doesn't happen. The market price between 0¢ and 100¢ is the implied probability.

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.

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.