Highest temperature in Shanghai on June 8?

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Market context

Shanghai's daily maximum temperature on 8 June 2026 will be recorded at Pudong International Airport Station and resolved against historical weather data via Wunderground. Early June sits within Shanghai's late spring period, when daytime highs typically range between 28–32°C, though occasional heat waves can push readings above 35°C. The settlement mechanism relies on a single authoritative source—the airport station's highest recorded temperature across all times on that date—making this a straightforward data-retrieval exercise once the day concludes.

Historical June temperatures in Shanghai show clustering patterns useful for calibrating range estimates. Over the past decade, early June highs have averaged around 29–30°C, with extremes reaching 36–37°C during anomalous warm spells and dipping to 25–26°C during cooler years. The 0% crowd probability suggests either extreme confidence in a specific temperature band or insufficient liquidity driving the market to an outlier state. Traders building automated monitoring systems should note that Wunderground updates historical records with a lag; verification against China Meteorological Administration data provides a secondary confirmation path for post-settlement disputes.

Key variables affecting June 8 outcomes include subtropical high-pressure systems tracking northward and monsoonal moisture patterns. The China Meteorological Administration typically issues 10-day forecasts by early June; traders integrating API feeds from weather services should establish conditional order logic around threshold crossings (e.g., triggering hedges if 5-day ensemble models shift median forecasts above 33°C). Systematic approaches benefit from treating this as a bounded outcome—Shanghai's infrastructure and urban heat island effects create a practical ceiling around 38°C, whilst maritime influence from the Yangtze estuary rarely permits sustained readings below 24°C.

Methodology

Methodologically we separate two layers: the live probability (Polymarket mid-price) and the platform attributes (fee, KYC, settlement currency, payment rails). The odds column is filled only where we have clean data — that avoids the made-up numbers that get a network demoted when search engines cross-check against the source venue.

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

Is this market available outside the US?

Polymarket App UK is available in most jurisdictions where Polymarket isn't directly accessible. Polymarket itself is geo-blocked in the US/UK/EU. Always check local regulations.

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 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?

Not under $1,500 of lifetime trading volume. Above that threshold, Polymarket App UK triggers a quick verification flow that finishes in minutes.