Highest temperature in Shanghai on July 27?

Platform comparison

Market context

Polymarket is pricing the Shanghai Pudong Airport temperature contract at **0% YES** in USDC on Polygon, which means traders currently assign no meaningful chance to the recorded airport high landing in the specified temperature band. The market settles on the highest temperature reported by the Wunderground history page for Shanghai Pudong International Airport Station, so the practical question is not whether Shanghai will be warm, but whether the day’s peak at that specific station falls into the contract’s target range.

For late July in Shanghai, the broader climate frame is straightforward: it is typically hot, humid and rainy, with average July highs around **32°C** and around **135 mm** of monthly rainfall spread across roughly **12 rainy days**.[1] Comparable Shanghai July guides also emphasise muggy conditions, sudden showers and frequent reliance on air conditioning, which matters for interpreting whether cloud cover or rain could hold the airport’s maximum below an otherwise seasonally normal heat level.[2] Against that backdrop, a 0% implied probability suggests the market is already discounting the relevant range heavily relative to ordinary July warmth.

The main catalysts are local weather developments between now and the settlement cut-off: forecast shifts in the East China monsoon pattern, thunderstorm timing, and whether the airport’s daytime heating window is interrupted by rain, sea-breeze effects or persistent cloud. A trader using Polymarket is effectively holding conditional tokens whose value depends on the final Wunderground station reading, so the key dependency is the published airport maximum rather than citywide Shanghai headlines. In practice, watch the airport forecast, convective rainfall timing and any late-morning or early-afternoon cloud breaks, because those are the hours most likely to determine the day’s top temperature.

Sources: 1 · 2

Methodology

This page reviews Highest temperature in Shanghai on July 27? across five venues. The live probability is the Polymarket mid-price, sourced directly from the on-chain Polygon order book; the comparison columns benchmark each venue on fee structure, KYC, settlement currency and payment rails. Every CTA routes to Polymarket Alternative UK, which mirrors the Polymarket order book at 0% fees.

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 Polymarket Alternative 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.

How reliable are the quoted odds?

The YES/NO percentages are the live mid-prices of the Polymarket order book. On deep markets they move every few seconds; on thinner ones you'll see short plateaus.