Highest temperature in Shanghai on July 11?

Platform comparison

Market context

Shanghai’s July 11 high temperature hinges on whether persistent subtropical high pressure delivers a dry, sun-baked day or if incoming thunderstorms cap the heat. The market currently assigns 0% probability to any outcome below 31°C, yet trader consensus clusters around 31–32°C, with 31°C as the frontrunner at 37% and 30°C trailing at 24%[1]. This divergence suggests the 0% implied probability on lower ranges may be overstated; historical data shows July highs at Pudong Airport regularly exceed 30°C but can dip to 29–30°C when cloud cover or precipitation intervenes[2][6]. The 30°C outcome represents a clear underdog value spot if ensemble models underestimate storm risk, while 32°C+ remains the favourite only if the high-pressure system remains unbroken.

Traders should monitor the 72-hour forecast updates from NOAA and Meteoblue for shifts in precipitation probability, as heavy rain forecasts for mid-July could suppress daytime maxima below consensus[5][9]. A recent Meteoblue run indicates a 30% chance of local showers and thunderstorms on July 11, with highs potentially capped near 84°F (29°C) if clouds persist[5]. The key dependency is the timing of any storm system relative to peak solar heating; late-afternoon rain would limit the high, whereas morning clearance could push temperatures toward 33°C. Watch for real-time revisions on Wunderground, the official resolution source, as temperature datapoints may be adjusted until the following day’s first reading is published[1].

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

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 Who Will Win. 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.

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