Platform comparison
| Platform | YES odds | NO odds | Fee | KYC | Settlement | |
|---|---|---|---|---|---|---|
Polymarket (via Sport Prediction) Pick polygram.ink (preferred broker) |
100% | 0% | 0% (USDC on-chain) | No-KYC up to $1,500 | USDC, auto via UMA oracle | Live odds → |
Polymarket (direct) polymarket.com |
100% | 0% | 0% | Geo-blocked in US/UK/EU | USDC, on-chain | Live odds → |
Kalshi kalshi.com |
— | — | Up to 7% per trade | US-only, KYC required | USD | Live odds → |
Betfair Exchange betfair.com |
— | — | 2-5% commission | Full KYC from first trade | GBP / EUR | Live odds → |
Manifold Markets manifold.markets |
— | — | Play-money (mana) | None — play-money | Mana (no cash-out) | Live odds → |
Outcome probabilities
Current market-implied probability for each outcome, from the live order book.
| Outcome | Probability |
|---|---|
| 33°C | 100% |
| 28°C or below | 0% |
| 29°C | 0% |
| 30°C | 0% |
| 31°C | 0% |
| 32°C | 0% |
| 34°C | 0% |
| 35°C | 0% |
| 36°C | 0% |
| 37°C | 0% |
| 38°C or higher | 0% |
Market context
Beijing is entering its hottest and most rainy month, with July 7 falling squarely in the peak of summer heat. Historical data confirms that daytime temperatures at the Beijing Capital International Airport typically average 30°C, while the monthly high can reach 32°C or higher, especially during sunny spells before heavy rainfall [1][3]. The current crowd-implied probability of 0% for a specific high-temperature range appears inconsistent with these baselines, as July is consistently the hottest month with an average high of 87°F (30.6°C) and frequent spikes above 32°C [3][5]. Recent observations from the southern suburb observatory on July 6 recorded a temperature of 40.1°C, demonstrating that extreme heat events are not only possible but have already occurred in the immediate lead-in to the settlement date [7].
Traders should monitor the weather forecast for the next 24 hours, as heavy rain totalling 48mm is expected to begin Monday night, potentially suppressing peak temperatures for July 7 [6]. The key dependency is the timing of this rainfall; if it arrives before midday, the high temperature may stay below 32°C, but if it delays, sunny conditions could push temperatures toward the 32°C threshold priced at 29.5% in similar markets [2]. Watch for real-time updates from Wunderground and local meteorological services, as the changeable July weather requires constant vigilance before the 12:00–14:00 window when ultraviolet rays are strongest [1]. The settlement hinges on whether the rain clears quickly enough to allow a heat spike, a scenario that recent data suggests is plausible given the preceding 40°C day [7].
Methodology
Sports-specific comparison page for Highest temperature in Beijing on July 7?. 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.
- Can I bet on individual matches?
- Yes, Polymarket lists every major Premier League / Champions League / World Cup match as its own market. Liquidity varies — top matches like El Clásico or a semi-final often have six-figure pools, lower-league games closer to three-figure.
- 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.
- 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.
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