Highest temperature in Shanghai on August 18?

Platform comparison

Market context

Shanghai's weather in mid-August sits firmly within the city's summer monsoon season, with temperatures typically ranging between 28–35°C during daytime hours. The 0% crowd probability suggests traders are pricing in either extreme confidence in a specific temperature band or uncertainty about which range will resolve. August 18th falls during peak summer conditions when Shanghai experiences high humidity and frequent afternoon thunderstorms driven by the East Asian summer monsoon, though these systems rarely suppress daily highs below the seasonal norm.

Historical August data from Shanghai Pudong International Airport shows consistent patterns: the highest daily temperatures in mid-August have clustered between 32–36°C over the past decade, with readings above 37°C occurring roughly once every three to four years during particularly intense heat waves. The 2013 heat wave pushed temperatures to 38.3°C in August, whilst cooler years have seen highs settle around 30–31°C. The current crowd probability of 0% for some range suggests either the market has concentrated heavily on a single outcome or traders are awaiting clarification on which specific temperature band the question targets.

Traders should monitor tropical cyclone activity in the Western Pacific during early-to-mid August 2026, as these systems can dramatically alter Shanghai's weather patterns and suppress temperatures through cloud cover and precipitation. The China Meteorological Administration's seasonal forecasts, typically released in late July, will provide guidance on whether 2026 August conditions favour above or below-average temperatures. Resolution depends entirely on the Daily Observations table at Weather Underground using Shanghai Pudong station data, making source verification critical before settlement.

Methodology

Football-specific comparison page for Highest temperature in Shanghai on August 18?. Polymarket's live quote (Polygon order book) plus platform attributes for the three reference venues. Sports markets reward liquidity — Polymarket and Betfair are materially deeper than Kalshi (US-focused) or Manifold (play-money).

Resolution & payout

Sports markets typically settle on official final-whistle plus league confirmation. Polymarket uses UMA Optimistic Oracle with a source URL per contract — usually official league data feeds or ESPN/Soccerway. Two-hour dispute window, then smart-contract payout in USDC.

UK Frequently Asked Questions

Are prediction markets better than sports betting?

Prediction markets tend toward tighter odds than bookmakers because they use peer-to-peer exchange rather than bookmaker margin. On major matches, Polymarket quotes typically sit 2-5% closer to the true probability model than bet365 or DraftKings.

What are live sports odds on Polymarket?

Some top-tier matches stay open during play — you can trade the half-time probability in the 70th minute. Polymarket mid-prices update second-by-second; any frontend mirroring the order book shows the same movement.

Which sports markets are available?

Football (soccer) dominates — Champions League, World Cup, Premier League, La Liga, Bundesliga — followed by NFL, NBA, tennis Grand Slams, Formula 1, boxing/MMA. Resolution via official league source confirmation.

What's the difference between match odds and outright odds?

Match odds cover a single game ("Bayern beats BVB"). Outright odds are long-term aggregates ("Bayern wins the league"). Outright markets have deeper liquidity; match markets have faster resolution.

Can I trade Premier League prediction markets from the UK?

Yes. Polymarket has Premier League outcome markets (title winner, relegation, top scorer). For UK traders wanting GBP settlement and UKGC protection, Betfair Exchange and Smarkets offer Premier League futures and match markets. Betfair is the deepest liquidity venue for UK football exchange markets.