Highest temperature in Shanghai on August 2?

Platform comparison

Market context

Polymarket is pricing this Shanghai airport heat contract at **0% YES** today, so the market is effectively saying the highest temperature at Shanghai Pudong International Airport on 2 August 2026 is not expected to land in a Yes-paying range. On Polymarket, traders post USDC on Polygon and hold conditional tokens that settle against the Wunderground airport history page, so the relevant question is whether the day’s maximum at ZSPD reaches the bracket you have bought, not whether Shanghai feels hot in a general sense.

That 0% needs to be read against Shanghai’s usual August climate rather than a normal day’s average. Shanghai is typically near its seasonal peak in August, with average highs around 32°C to 35°C and occasional extreme spikes into the high 30s or even around 40°C in historical citywide records, while one weather source shows August highs commonly in the upper 80s to low 90s Fahrenheit and rare days above the mid-90s Fahrenheit equivalent[1][2][5][6][8]. For a single-airport settlement, though, the exact reading at Pudong can differ from downtown conditions, and a “highest temperature” contract is usually driven by the day’s brief peak rather than the daily mean.

The main catalysts are straightforward: sunshine, humidity, and the path of any late-summer rainbands or typhoon remnants moving through the Yangtze Delta, all of which can cap daytime heating or, in clear conditions, let temperatures surge quickly. Forecast feeds currently show Shanghai’s early-August highs mostly in the low 80s to low 90s Fahrenheit, with some day-to-day variation but no obvious signal of an exceptional heat spike at present[9][10][16]. Traders watching the order book should therefore track the local forecast cadence, any official typhoon advisories, and the Wunderground hourly update near the settlement window, because the on-chain payout only depends on the final reported maximum, not on earlier intraday trading sentiment.

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

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

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.