Highest temperature in Shanghai on July 25?

Platform comparison

Market context

Shanghai's peak temperature on 25 July 2026 will be recorded at Pudong International Airport Station and settled against historical data from Weather Underground. The 0% crowd-implied probability reflects the market's current state ahead of settlement in mid-2026, with no meaningful trading activity yet established across major prediction platforms.

July temperatures in Shanghai typically range between 32–36°C, with extremes occasionally reaching 37–39°C during heat waves. The city's summer climate is shaped by subtropical monsoon patterns and urban heat-island effects. Historical data from the past decade shows that temperatures above 38°C occur roughly once every three to four years during July, whilst readings below 31°C are rare. The settlement mechanism anchors to Pudong station records, which tend to register slightly higher readings than central Shanghai due to the airport's exposed location. Current market pricing at 0% suggests traders are either awaiting more granular forecasting data or treating this as a placeholder contract pending seasonal model updates closer to the resolution date.

Meaningful price movement will likely follow the release of extended-range forecasts from the China Meteorological Administration in late June 2026, which typically provide 10–14 day outlooks with greater confidence. El Niño or La Niña conditions active during early 2026 could influence summer monsoon intensity and thus peak temperatures. Traders should monitor any significant atmospheric oscillation indices and tropical cyclone activity in the Western Pacific, as these can suppress or amplify heat accumulation in the Yangtze River Delta region during late July.

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

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 PolyGram. Kalshi charges up to 7% per trade; Betfair Exchange takes 2-5% commission on net winnings.

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 PolyGram trigger KYC only above $1,500 of lifetime trading volume; under that you trade pseudonymously with a single wallet address.