Highest temperature in Wuhan on July 19?

Platform comparison

Market context

Wuhan's summer temperatures on 19 July 2026 will be measured against historical records from Tianhe International Airport, the city's primary weather observation point. July represents peak summer in central China, with Wuhan consistently ranking among the nation's hottest cities during this period. The 0% crowd-implied probability across prediction markets suggests either extreme confidence in a specific temperature band or minimal trading activity on this particular contract.

Wuhan's July climate is remarkably consistent year-on-year. Over the past two decades, maximum temperatures on mid-July dates have ranged between 32–38°C, with 35°C representing a typical threshold. The 2013 heat wave pushed readings to 40°C, though such extremes occur roughly once per decade. Current market pricing at 0% indicates traders are heavily concentrated in a single temperature bracket, likely reflecting seasonal norms rather than any forecast divergence. This clustering suggests limited arbitrage opportunity between prediction markets and conventional weather forecasting platforms.

The settlement mechanism depends entirely on Wunderground's historical database for Tianhe Airport, which records hourly observations throughout the day. Traders should verify the exact timezone handling—Wuhan operates on China Standard Time (UTC+8)—and confirm that Wunderground's daily maximum aligns with the 24-hour period specified in the settlement window. No scheduled weather events or atmospheric phenomena are anticipated to create unusual volatility for this date, making the contract primarily a test of baseline seasonal expectations rather than a response to identifiable catalysts.

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 vs Polymarket, 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 vs Polymarket. 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.

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