Platform comparison
| Platform | YES odds | NO odds | Fee | KYC | Settlement | |
|---|---|---|---|---|---|---|
Polymarket (via Who Will Win) 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 |
|---|---|
| 15°C | 100% |
| 7°C or below | 0% |
| 8°C | 0% |
| 9°C | 0% |
| 10°C | 0% |
| 11°C | 0% |
| 12°C | 0% |
| 13°C | 0% |
| 14°C | 0% |
| 16°C | 0% |
| 17°C or higher | 0% |
Market context
Wellington’s airport temperature market is trading as a **heavy underdog** at a crowd-implied **0% yes**, but the live weather picture does not support a zero event in any literal sense. AccuWeather has Wellington at **60°F/49°F** for 10 August, with a forecast high around **15.6°C**, and Weather Underground is already showing a morning reading in the mid-teens Celsius equivalent, so the market consensus appears to be that the top-end outcome sits comfortably in the low-to-mid teens rather than an extreme spike.[2][5]
From a handicapper’s angle, this looks more like a question of *which bucket* the day lands in than whether it reaches a plausible range at all. Wellington’s August climate is generally cool and stable: long-run references put typical daytime highs around **12°C**, with August highs usually clustered near **11–12°C** and rarely exceeding the upper teens.[10][18][19] That framing matters because a 0% price can create value in the nearest sensible band if the market is being asked to resolve to a modestly warmer-than-average peak, while the real contrarian risk is a benign sunny spell that nudges the airport reading a degree or two higher than the broader regional forecast.[2][10]
Traders should watch the rest of the day’s hourly progression at Wellington Intl Airport, since the settlement source is the **Weather Underground daily observations table**, not the summary high/low box. The key dependency is whether the midday period reaches or briefly exceeds the early forecast peak; AccuWeather is calling **sunny to partly cloudy** conditions with only a **20%** precipitation chance, which makes the upside mostly a temperature-and-cloud-cover question rather than a rain event.[2][3][5] If the airport station runs a little warmer than central Wellington forecasts suggest, the value shifts towards the higher adjacent range; if marine air and southerly flow hold, the consensus low-teens outcome remains dominant.[6][13]
Methodology
This page is a comparison snapshot: one live quote, four reference venues with their key attributes, and a single execution path — every trade button routes to Who Will Win, which mirrors the Polymarket order book directly.
Resolution & payout
Settlement runs on-chain. Polymarket's contract logic separates YES and NO shares as conditional tokens; at resolution the winning share lifts to $1.00 and the losing one to $0. The outcome input comes from the UMA Optimistic Oracle, which secures against bad resolution with a bond + dispute window.
Once finalised, the smart contract pays USDC to the holders' wallets within minutes — no withdrawal fees beyond Polygon network gas. Kalshi settles in USD via CFTC clearance, Betfair in account currency net of commission, Manifold in play-money mana with no cash-out.
UK Frequently Asked Questions
- Where can I trade this market with the lowest fees?
- Polymarket is geo-blocked in the US/UK/EU. The easiest 0%-fee broker into the same order book is Who Will Win. Kalshi charges up to 7% per trade; Betfair Exchange takes 2-5% commission on net winnings.
- Is this market available outside the US?
- Polymarket itself is geo-blocked in the US/UK/EU. Always check the legal status of prediction markets in your jurisdiction before trading.
- 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%.
Trade Highest temperature in Wellington on August 10? on Who Will Win
Live order book, 0% fees, USDC settlement in seconds.
Open live market →