Pronóstico: Highest temperature in Shanghai on August 6?

Platform comparison

Market context

Polymarket has this contract at **0% YES** even though Shanghai’s airport-weather benchmark on 6 August is normally a hot, humid mid-summer reading, not an extreme one. The market resolves to the **highest temperature recorded at Shanghai Pudong International Airport Station** during the day, settled from Wunderground, so traders are not pricing the city-wide “feel” of Shanghai but the specific airport observation that lands in the relevant Celsius bucket.

That 0% print is best read against Shanghai’s August climatology. Forecast providers put early-August highs in the low-to-mid 30s °C, with AccuWeather showing August daily highs broadly in the 82° to 92°F range and TravelChinaGuide describing August as very hot and humid, with a typical high around 32°C and rain risk in typhoon season[1][9]. Time and Date’s forecast for 6 August points to around 95°F/35°C with passing showers, while other forecast sites are calling for similar heat with cloud and rain; that makes the current zero price look like a position on a lower-than-expected terminal reading rather than on an unusual cold spell[2][4][13].

The practical catalysts are the hourly temperature profile, shower timing, and any shift in humidity or cloud cover around the midday to afternoon peak, when Shanghai usually posts its day’s maximum. If rain arrives earlier or lingers, the maximum can be capped; if skies brighten, a quick climb towards the mid-30s °C is plausible. For Polymarket users, the on-chain exposure is straightforward: USDC-backed conditional tokens on Polygon settle to whichever temperature band Wunderground records at Shanghai Pudong Airport, so the key is the airport station’s actual printed high rather than broader city forecasts or nearby observations.

Sources: 1 · 2 · 3 · 4 · 5

Methodology

This page reviews Pronóstico: Highest temperature in Shanghai on August 6? 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 Qué Es, 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

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 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 Polymarket Qué Es 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.