Platform comparison
| Platform | YES odds | NO odds | Fee | KYC | Settlement | |
|---|---|---|---|---|---|---|
Polymarket (via Mundial 2026 Grupos) Pick polygram.ink (preferred broker) |
46% | 54% | 0% (USDC on-chain) | No-KYC up to $1,500 | USDC, auto via UMA oracle | Live odds → |
Polymarket (direct) polymarket.com |
46% | 54% | 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 |
|---|---|
| 27°C | 46% |
| 28°C | 26% |
| 26°C | 21% |
| 25°C | 7% |
| 29°C | 2% |
| 24°C | 1% |
| 20°C or below | 0% |
| 21°C | 0% |
| 22°C | 0% |
| 23°C | 0% |
| 30°C or higher | 0% |
Market context
The market settles on the highest temperature recorded at London City Airport on 15 August 2026, using Weather Underground's Daily Observations table as the primary source. The settlement window closes at midday UTC, meaning afternoon readings could influence the final resolution if they exceed morning peaks.
August temperatures at London City Airport typically range between 19–24°C, with historical highs occasionally reaching 28–30°C during heat waves. The 0% crowd probability suggests traders are pricing in an expectation that the temperature will fall below the lowest available range option on the market. August 2024 saw London peak at 28°C mid-month, whilst the summer of 2022 produced several days exceeding 30°C. The distinction between Weather Underground's Daily Observations and Day High & Low summaries matters operationally; the former captures granular hourly readings and occasionally differs from rounded summary figures, creating potential settlement edge cases.
Traders should monitor long-range forecasting models from mid-July onwards, particularly the UK Met Office's extended outlook and European ensemble predictions. Atlantic weather patterns in early August will signal whether high-pressure systems establish over the British Isles, which typically drives temperatures upward. Any significant heat dome tracking towards northern Europe in the fortnight preceding 15 August would shift probability materially. The specific airport location—positioned in East London with urban heat-island effects—tends to record slightly higher temperatures than central London readings, a factor worth cross-referencing against broader regional forecasts closer to settlement.
Methodology
Football-specific comparison page for Pronóstico: Highest temperature in London on August 15?. 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
- 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.
- 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.
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