Highest temperature in Shanghai on July 25?

Platform comparison

Market context

Shanghai's summer heat on 25 July 2026 will be measured against historical benchmarks at Pudong International Airport, the official weather station for the city. The market currently prices all temperature ranges at 0% probability on Polymarket, suggesting either technical settlement issues or minimal trading activity on this specific contract. Traders holding conditional tokens pegged to USDC on Polygon will need to monitor Wunderground's historical data feed, which records daily highs with precision to the decimal point—the resolution mechanism that determines which temperature bracket ultimately settles in-the-money.

July represents Shanghai's hottest month climatologically, with average daily highs around 32°C and extremes regularly exceeding 35°C. The city recorded 40.9°C in August 2013 and has seen multiple days above 38°C during recent summers, establishing a pattern where mid-to-high 30s are the norm rather than exception. This historical context suggests the market's current 0% reading across all brackets reflects pricing dysfunction rather than genuine forecast consensus.

Traders should track China Meteorological Administration forecasts released in early July 2026, which typically provide 10-day outlooks with reasonable accuracy for temperature ranges. El Niño or La Niña conditions active during that period could shift seasonal patterns; the current phase of the Pacific climate cycle will influence whether Shanghai experiences typical summer heat or anomalous conditions. Real-time atmospheric pressure systems and tropical cyclone activity in the Western Pacific during late July represent the primary catalysts that could push temperatures toward historical extremes or moderate them below seasonal norms.

Methodology

This page is a comparison snapshot: one live quote, four reference venues with their key attributes, and a single execution path — every trade button routes to Kalshi UK, which mirrors the Polymarket order book directly.

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

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

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.

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.

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