Highest temperature in Shanghai on August 2?

Platform comparison

Market context

Shanghai’s reading will be the **highest temperature** logged at Shanghai Pudong International Airport Station during the local day, so the key variable for traders is the day’s peak rather than the evening close. August in Shanghai is structurally hot and humid: average highs sit around the low 30s °C, with typical daily highs near 32–35°C and historical August extremes reaching 40–41°C in city-level records. That makes the market operationally simple to model: a programmatic setup would usually pull the station’s daily maximum from the Wunderground history page, map it to the contract’s Celsius bands, and compare it against the implied distribution from comparable August days.[2][3][5][6][9]

The current 0% YES price implies the crowd is treating the event as effectively out-of-the-money, but that only makes sense if the strike range is unusually high relative to the seasonal baseline or if traders expect a cooler, rain-affected day. For calibration, comparable August profiles in Shanghai regularly produce highs around 31–35°C, while the rarer heatwave tail pushes into the upper 30s or low 40s.[1][2][4][8][14] A utility-minded trader would therefore anchor on whether the airport station is likely to print an ordinary hot-summer maximum or a rare extreme; the airport-specific source matters because coastal fog, convection, and typhoon-adjacent rainfall can leave the city broadly hot while suppressing the exact station maximum.

For catalysts, watch the short-term forecast, typhoon-track updates, and any changes in rainfall timing between the overnight hours and the midday heating window, because those directly affect the day’s peak temperature. Shanghai’s own weather guidance describes August as hot and typhoon-prone, and forecast services show high variability in early-August daily highs around the upper 20s to low 30s °C depending on cloud cover and rain timing.[8][10][14][15] Programmatically, the cleanest workflow is to refresh forecast inputs through the morning UTC window, set conditional orders around the most likely band, and re-price only if new tropical-weather guidance shifts the expected maximum materially.

Sources: 1 · 2 · 3 · 4 · 5

Methodology

This page reviews Highest temperature in Shanghai on August 2? 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 Kalshi Fees, which mirrors the Polymarket order book at 0% fees.

Resolution & payout

Polymarket-based markets settle through the UMA Optimistic Oracle on Polygon. A proposer submits the outcome, a two-hour challenge window opens, and unchallenged proposals finalise the resolution. Payouts settle automatically in USDC the moment the result is final — no bookmaker, no delay.

Kalshi-based markets settle in USD via the CFTC-regulated clearinghouse. Betfair Exchange settles in GBP/EUR net of commission. Manifold is play-money and does not pay out real funds.

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 Fees. 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 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.

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