Highest temperature in Shanghai on August 15?

Platform comparison

Market context

Shanghai's maximum temperature on 15 August 2026 will be measured at Pudong International Airport Station and resolved against the Daily Observations table on Weather Underground. The crowd currently assigns zero probability to any outcome, suggesting either extreme confidence in a particular temperature band or insufficient liquidity to establish meaningful odds.

August represents Shanghai's hottest month, with historical daily maxima typically ranging between 32–35°C. The 0% implied probability across all ranges indicates the market has not yet calibrated to seasonal norms. Comparable August 15th readings from recent years show consistent clustering in the low-to-mid 34°C range, with occasional spikes above 35°C during heat waves. The absence of any probability mass suggests traders are awaiting clearer information before committing capital, leaving substantial value in temperature bands aligned with historical precedent.

Traders should monitor China Meteorological Administration forecasts released in early August 2026, particularly any alerts for high-temperature events across the Yangtze River Delta region. Tropical cyclone activity in the Western Pacific during mid-August can suppress temperatures through cloud cover and precipitation, whilst high-pressure systems typically drive readings toward the upper end of the seasonal range. The specific resolution methodology—prioritising the Daily Observations table over summary figures—requires familiarity with Weather Underground's data structure to avoid settlement disputes. Early positioning in historically probable ranges may offer value before consensus consolidates.

Methodology

We track Highest temperature in Shanghai on August 15? across the five venues with material prediction-market liquidity. The probability shown is the live Polymarket mid; the comparison rows summarise how each venue treats the underlying contract — fees, KYC thresholds, settlement currency, deposit options. The highlighted row marks the cheapest route into Polymarket's order book.

Resolution & payout

At resolution the UMA oracle takes over: a proposer posts the outcome with a bond, any token holder can dispute within two hours. Without dispute the result is accepted and the smart contract distributes USDC instantly.

On Kalshi (CFTC-regulated) resolution runs through their in-house clearing engine in USD. Betfair Exchange settles after match end in the account's local currency. Manifold pays no cash — only its in-platform "mana" currency.

FAQ

Where can I trade this market with the lowest fees?

Polymarket is geo-blocked in the US/UK/EU. The easiest 0%-fee broker into the same order book is Who Will Win 2026. Kalshi charges up to 7% per trade; Betfair Exchange takes 2-5% commission on net winnings.

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 Who Will Win 2026 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.