Highest temperature in Shanghai on August 13?

Platform comparison

Market context

Shanghai's maximum temperature on 13 August 2026 will be measured at Pudong International Airport Station and reported in Weather Underground's Daily Observations table, with resolution tied to that specific data source rather than summary forecasts. The market currently shows 0% implied probability, suggesting traders are either absent or awaiting baseline climate data before positioning.

August temperatures in Shanghai typically range between 32–35°C, with extremes occasionally reaching 37–38°C during heat waves. Historical records show that mid-August peaks are influenced by the East Asian summer monsoon's intensity and any tropical cyclone activity in the Western Pacific. Reviewing Weather Underground's historical daily observations for Shanghai across previous Augusts provides the empirical foundation for calibrating range expectations; traders building automated resolution checkers should note that the Daily Observations table updates with intraday readings, not just final daily summaries, making real-time API polling necessary for precision settlement verification.

The key catalyst window runs from late July through 12 August 2026, when meteorological forecasts solidify and any approaching tropical systems become visible on regional weather models. China Meteorological Administration bulletins and Japan Meteorological Agency typhoon tracking will signal whether anomalous heat or storm-driven cooling dominates the forecast cone. Traders implementing conditional orders should programme for data latency on Weather Underground's Shanghai station feed and establish fallback verification against official CMA records, since the market's explicit reliance on Wunderground's Daily Observations table creates a single point of reference that may lag by several hours post-observation.

Methodology

This page is a comparison snapshot: one live quote, four reference venues with their key attributes, and a single execution path — every trade button routes to Polymarket Bot UK, which mirrors the Polymarket order book directly.

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.

UK Frequently Asked Questions

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 Polymarket Bot UK. Kalshi charges up to 7% per trade; Betfair Exchange takes 2-5% commission on net winnings.

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.

Is Polymarket legal in the UK?

Polymarket is accessible to UK traders but is not UKGC-licensed. It operates under US CFTC jurisdiction. UK residents face no domestic legal prohibition on using it, but UKGC consumer protections do not apply. For UKGC-regulated alternatives, Betfair Exchange and Smarkets offer similar prediction-style markets.

Do I pay tax on prediction market profits in the UK?

UKGC-licensed platform profits (Betfair, Smarkets) are typically tax-free gambling winnings for UK individuals. Polymarket profits involve USDC crypto transactions, which HMRC treats as Capital Gains Tax events. Keep full transaction records and report via Self Assessment if gains exceed £3,000 per tax year.

How do I deposit on Polymarket from the UK?

UK traders typically fund Polymarket via Coinbase UK, Kraken or Revolut — buying USDC with GBP and transferring to a Polygon-compatible wallet (MetaMask, Coinbase Wallet). Polymarket's onboarding walks you through the bridging process. Typical GBP-to-USDC conversion costs 0.5–1%.