Highest temperature in Shanghai on August 20?

Platform comparison

Market context

Shanghai's weather in late August sits within the city's peak summer season, characterised by high humidity and frequent afternoon thunderstorms. Historical data from Shanghai Pudong International Airport shows August temperatures typically peak between 32–35°C, though extreme heat events occasionally push readings above 36°C. The 0% crowd probability suggests traders are pricing in either exceptionally cool conditions or uncertainty about the resolution methodology rather than dismissing a plausible outcome.

August 20th falls during Shanghai's monsoon-influenced period, when tropical systems and convective activity can suppress daytime highs. The past decade shows considerable year-to-year variation; 2022 saw a peak of 35.6°C on that date, whilst 2019 recorded 33.2°C. The critical distinction in this market's resolution—using Weather Underground's Daily Observations table rather than summary highs—introduces a technical dependency that may explain the depressed probability if traders lack confidence in data availability or interpretation consistency.

Traders should monitor seasonal forecasts from China's Meteorological Administration and track any announced changes to Shanghai Pudong's weather station protocols. The settlement window closes at midday UTC on August 20th, creating a narrow window for final data confirmation. Given the specificity of the resolution source and the historical clustering of August temperatures in Shanghai, the current 0% probability appears misaligned with climatological precedent, though the technical resolution requirements warrant caution about data accessibility.

Methodology

Sports-specific comparison page for Highest temperature in Shanghai on August 20?. 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 or Manifold.

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.

FAQ

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.

How fast do sports winnings settle?

Once the official league outcome is logged in the UMA Oracle (typically 1-2 hours after the final whistle), Polymarket's smart contract triggers USDC payout. To your wallet within minutes.

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 import form data and lineups?

This page shows the live Polymarket quote as an implied probability. Form data and lineups must be researched separately via sports data providers (e.g. Soccerway, ESPN, FBref) — we surface the market probability, not the sport analysis.