Highest temperature in Shanghai on August 15?

Platform comparison

Market context

Shanghai's highest temperature on 15 August 2026 will be recorded at Pudong International Airport Station and measured against historical August conditions in the city. Mid-August typically falls within Shanghai's summer monsoon season, when daily highs routinely exceed 32°C, with occasional peaks above 35°C during heat waves. The settlement will draw from Weather Underground's Daily Observations table rather than summary figures, a distinction that matters when intraday temperature spikes occur between official reporting intervals.

August temperature records for Shanghai show consistent patterns across comparable years. Between 2015 and 2024, the highest temperatures recorded on 15 August ranged from 29.5°C to 35.8°C, with six of ten years exceeding 33°C. The 0% crowd probability currently implied suggests traders are either awaiting specific temperature thresholds to be defined or reflecting uncertainty about which range bins the market will offer at settlement. Without published range specifications, the probability distribution remains difficult to assess against historical volatility.

Traders should monitor China Meteorological Administration forecasts released in early August 2026, which typically provide ten-day outlooks with reasonable accuracy for maximum temperatures. Tropical cyclone activity in the Western Pacific during mid-August can substantially alter Shanghai's weather patterns, either suppressing temperatures through cloud cover or intensifying heat through atmospheric pressure changes. Real-time observations from Pudong station will become the decisive reference point once the settlement date approaches, making live weather data feeds essential for position management in the final week.

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

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.

Do I need to KYC for this market?

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

How reliable are the quoted odds?

The YES/NO percentages are the live mid-prices of the Polymarket order book. On deep markets they move every few seconds; on thinner ones you'll see short plateaus.