Highest temperature in Chongqing on August 4?

Platform comparison

Market context

The temperature at Chongqing Jiangbei International Airport on 4 August is expected to be very hot, with forecasters and climate normals both pointing to an afternoon high in the mid-to-upper 30s Celsius. AccuWeather’s airport forecast puts highs around the mid-30s, while other August guides for Chongqing describe 34–42°C daytime heat as normal for the city’s peak summer period[6][1][14][15]. Against that backdrop, a crowd-implied **0% YES** looks inconsistent with the climatology and with the published airport forecast, although the market resolves only on the airport station’s observed daily maximum rather than citywide conditions[6][15].

Historically, August is Chongqing’s hottest month, and several references describe 35°C-plus days as routine, with some sources warning that 40°C days are common in the city centre[1][14][15]. For a contract framed around the airport station, the comparison set matters: airport-based forecasts are often a little cooler than inner-city readings, but AccuWeather still shows a daily high band reaching the high 80s to mid-90s Fahrenheit for early August, which is roughly 31–35°C[6]. That places most analyst-style expectations well above any low temperature bucket and squarely in the upper summer ranges.

The main catalysts are the same ones that drive any late-summer temperature market: the final airport forecast updates, any rain bands or thunderstorms arriving from the monsoon pattern, and whether cloud cover limits peak heating. Weather services for Chongqing currently show mixed signals, with some forecast products calling for patchy rain or light rain while still keeping daytime highs around 34–37°C[3][11][12]. Because the settlement window ends at 12:00 UTC, traders should watch whether the station’s maximum is likely to occur before then, as an early-morning cap from rain or haze would materially affect the recorded daily high.

Sources: 1 · 2 · 3 · 4 · 5

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 Best Prediction Markets. 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.

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.