Platform comparison
| Platform | YES odds | NO odds | Fee | KYC | Settlement | |
|---|---|---|---|---|---|---|
Polymarket (via توقعات كورة) Pick polygram.ink (preferred broker) |
98% | 2% | 0% (USDC on-chain) | No-KYC up to $1,500 | USDC, auto via UMA oracle | Open the market → |
Polymarket (direct) polymarket.com |
98% | 2% | 0% | Geo-blocked in US/UK/EU | USDC, on-chain | Open the market → |
Kalshi kalshi.com |
— | — | Up to 7% per trade | US-only, KYC required | USD | Open the market → |
Betfair Exchange betfair.com |
— | — | 2-5% commission | Full KYC from first trade | GBP / EUR | Open the market → |
Manifold Markets manifold.markets |
— | — | Play-money (mana) | None — play-money | Mana (no cash-out) | Open the market → |
Outcome probabilities
Current market-implied probability for each outcome, from the live order book.
| Outcome | Probability |
|---|---|
| 25°C | 98% |
| 26°C | 2% |
| 21°C or below | 0% |
| 22°C | 0% |
| 23°C | 0% |
| 24°C | 0% |
| 27°C | 0% |
| 28°C | 0% |
| 29°C | 0% |
| 30°C | 0% |
| 31°C or higher | 0% |
Market context
London’s **31 July** temperature market is settled on the single highest reading logged at **London City Airport Station**, so the key question is how warm the afternoon gets before the daily peak is fixed. The crowd’s **0% YES** price implies traders are not expecting the day to land in the listed target band, but London has produced several late-July heat spikes, including **37.8°C at Heathrow on 31 July 2020**, which remains one of the clearest comparable cases for this date in the capital.[1][2]
That historical anchor matters because London’s summer highs can move sharply when continental air builds over the south-east, yet the same city often finishes a few degrees below the headline regional maximum. On recent hot days, central London and Heathrow have both pushed into the low-to-mid 30s, with Heathrow at **31.2°C** in one 2025 update and forecasts during another spell pointing towards **32°C in London** and **33–34°C** more widely across south-east England.[12][9][16] Those ranges are consistent with a market that can remain live until early afternoon if cloud, sea breeze, or shower development trims the final maximum.
The main catalysts to watch are the short-range forecast updates and any midday changes in the London heat plume, because the settlement source is a station reading rather than a citywide average. If forecast models edge higher, the odds can reprice quickly; if the south-east stays closer to the upper 20s or low 30s, the market’s current scepticism is easier to understand.[16][9] For traders, the most relevant dependency is the temperature at Heathrow and other nearby London stations, since those often provide the best read-through for whether London City Airport can print a materially higher daily maximum.[1][15]
Methodology
Football-specific comparison page for توقع: Highest temperature in London on July 31?. 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.
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.
- 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.
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