Platform comparison
| Platform | YES odds | NO odds | Fee | KYC | Settlement | |
|---|---|---|---|---|---|---|
Polymarket (via Champions League Prediction) Pick polygram.ink (preferred broker) |
100% | 0% | 0% (USDC on-chain) | No-KYC up to $1,500 | USDC, auto via UMA oracle | See live odds → |
Polymarket (direct) polymarket.com |
100% | 0% | 0% | Geo-blocked in US/UK/EU | USDC, on-chain | See live odds → |
Kalshi kalshi.com |
— | — | Up to 7% per trade | US-only, KYC required | USD | See live odds → |
Betfair Exchange betfair.com |
— | — | 2-5% commission | Full KYC from first trade | GBP / EUR | See live odds → |
Manifold Markets manifold.markets |
— | — | Play-money (mana) | None — play-money | Mana (no cash-out) | See live odds → |
Outcome probabilities
Current market-implied probability for each outcome, from the live order book.
| Outcome | Probability |
|---|---|
| 15°C | 100% |
| 8°C or below | 0% |
| 9°C | 0% |
| 10°C | 0% |
| 11°C | 0% |
| 12°C | 0% |
| 13°C | 0% |
| 14°C | 0% |
| 16°C | 0% |
| 17°C | 0% |
| 18°C or higher | 0% |
Market context
Wellington's highest temperature on 21 August 2026 will be measured at the airport weather station and recorded in Weather Underground's Daily Observations table. The settlement window closes at midday UTC on that date, meaning the final reading must be captured before noon local time (8 p.m. NZST the previous evening) or the market resolves on the most recent observation available. August in Wellington typically sees daytime highs between 11–14°C, with the city's exposed coastal position and southerly wind patterns limiting temperature extremes during the southern hemisphere's late winter.
Historical data from Wellington Airport shows August daily maxima rarely exceed 16°C, with the station's all-time August high standing at 20.7°C (recorded in 1962). The 0% crowd probability suggests traders expect the market's upper temperature bands to remain unmet. Recent August conditions at the station have tracked consistently cool; August 2024 and 2023 both recorded maximum temperatures below 15°C on comparable dates. Wind direction and frontal systems moving across Cook Strait are the primary drivers of daily temperature variance in late winter.
The critical dependency is Weather Underground's data feed from Wellington Airport, which occasionally experiences brief outages or delays in updating the Daily Observations table. Traders should verify the resolution source's operational status in the days preceding 21 August 2026, as any gaps in hourly readings could affect which observation qualifies as the day's highest temperature. Unusual anticyclonic systems pushing warm air southward remain the only realistic catalyst for temperatures exceeding historical August norms.
Methodology
Football-specific comparison page for Highest temperature in Wellington on August 21?. 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.
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.
- 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.
- Can I trade Premier League prediction markets from the UK?
- Yes. Polymarket has Premier League outcome markets (title winner, relegation, top scorer). For UK traders wanting GBP settlement and UKGC protection, Betfair Exchange and Smarkets offer Premier League futures and match markets. Betfair is the deepest liquidity venue for UK football exchange markets.
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