Highest temperature in Chengdu on August 6?

Platform comparison

Market context

The outcome will be set by the day’s highest reading at Chengdu Shuangliu International Airport, so the key question is whether the airport reaches a level that lands inside the market’s stated temperature band on 6 August. Seasonal guides for Chengdu put August highs around 30°C, with typical daily ranges in the low 20s to low 30s Celsius, which means a mid-30s result would be warm but not outside the broader summer envelope.[1][4][7][16]

That context makes a 0% YES implied probability look unusually conservative against the climatology alone, because multiple sources describe August as the city’s hottest, humid month and put normal maxima near 30–32°C, with some forecasts for early August already in the low-to-mid 30s.[1][3][5][11][18] The comparable risk is not cold weather but whether cloud, rain, or a weaker daytime heating profile keeps the airport’s peak below the contract’s target range; a Hong Kong weather bulletin for Chengdu on 5 August projected 21–35°C with rain, which still leaves room for a high in the upper 20s or low 30s.[9]

For traders, the main catalysts are the live Wunderground observation for Chengdu Shuangliu and any short-range forecast updates from mainstream weather providers, rather than scheduled announcements. The current market should be read against cross-platform weather lines: AccuWeather and other forecast sites are showing hot conditions in the high 20s to low 30s Celsius, while the prediction market is pricing an effectively impossible outcome, so any move in local forecast highs, rainfall timing, or cloud cover could matter more than headline city averages.[2][6][14][20]

Sources: 1 · 2 · 3 · 4 · 5

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 Best Prediction Markets UK, which mirrors the Polymarket order book directly.

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.

UK Frequently Asked Questions

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 Best Prediction Markets 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.

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'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 are the best prediction markets for UK traders in 2026?

For UKGC-regulated markets: Betfair Exchange (sports, politics) and Smarkets (sports, politics, lower commission than Betfair). For broader global event prediction: Polymarket (deepest liquidity, 0% fee, USDC settlement). For US-regulated option: Kalshi (USD, limited UK payment options). Most serious UK traders use a combination of Betfair for regulated sports and Polymarket for broader markets.