Platform comparison
| Platform | YES odds | NO odds | Fee | KYC | Settlement | |
|---|---|---|---|---|---|---|
Polymarket (via Sport Prediction) Pick polygram.ink (preferred broker) |
64% | 36% | 0% (USDC on-chain) | No-KYC up to $1,500 | USDC, auto via UMA oracle | Live odds → |
Polymarket (direct) polymarket.com |
64% | 36% | 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 |
|---|---|
| 34°C | 64% |
| 33°C | 17% |
| 35°C | 16% |
| 36°C | 4% |
| 32°C | 2% |
| 30°C or below | 1% |
| 37°C | 1% |
| 31°C | 0% |
| 38°C | 0% |
| 39°C | 0% |
| 40°C or higher | 0% |
Market context
Paris-Le Bourget Airport will record its highest temperature on 15 August 2026, with the market currently pricing a 1% probability that this peak will fall into the upper temperature range specified. The resolution will depend on the Daily Observations table from Weather Underground rather than summary figures, creating a precise measurement standard that eliminates ambiguity from rounded or averaged data.
August temperatures at Paris-Le Bourget historically cluster in the 24–28°C range for daily highs, with extremes rare but documented. The station's 30-year climate data shows that temperatures exceeding 30°C occur in roughly 15–20% of August days, whilst readings above 32°C are infrequent enough to represent genuine outlier conditions. The 1% crowd probability suggests traders expect the market's upper threshold to sit well above typical August performance, making historical precedent a critical reference point for calibrating expectations against the specific range boundaries.
Traders should monitor European weather forecasting updates from mid-August 2026, particularly any heat dome or high-pressure system predictions from Météo-France or the European Centre for Medium-Range Weather Forecasts. Heatwave conditions across continental Europe would be the primary catalyst shifting probabilities upward. The resolution window closes at 12:00 UTC on 15 August, meaning forecasts issued 5–7 days prior will carry the most predictive weight. Any anomalous warming patterns reported in late July or early August would warrant reassessment of current pricing.
Methodology
Sports-specific comparison page for Highest temperature in Paris 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 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.
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.
- Is Polymarket legal in the UK?
- Polymarket is accessible to UK traders but is not UKGC-licensed. It operates under US CFTC jurisdiction. UK residents face no domestic legal prohibition on using it, but UKGC consumer protections do not apply. For UKGC-regulated alternatives, Betfair Exchange and Smarkets offer similar prediction-style markets.
- Do I pay tax on prediction market profits in the UK?
- UKGC-licensed platform profits (Betfair, Smarkets) are typically tax-free gambling winnings for UK individuals. Polymarket profits involve USDC crypto transactions, which HMRC treats as Capital Gains Tax events. Keep full transaction records and report via Self Assessment if gains exceed £3,000 per tax year.
- How do I deposit on Polymarket from the UK?
- UK traders typically fund Polymarket via Coinbase UK, Kraken or Revolut — buying USDC with GBP and transferring to a Polygon-compatible wallet (MetaMask, Coinbase Wallet). Polymarket's onboarding walks you through the bridging process. Typical GBP-to-USDC conversion costs 0.5–1%.
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