Platform comparison
| Platform | YES odds | NO odds | Fee | KYC | Settlement | |
|---|---|---|---|---|---|---|
Polymarket (via Who Will Win) Pick polygram.ink (preferred broker) |
99% | 1% | 0% (USDC on-chain) | No-KYC up to $1,500 | USDC, auto via UMA oracle | Live odds → |
Polymarket (direct) polymarket.com |
99% | 1% | 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 | 99% |
| 35°C | 1% |
| 36°C or higher | 1% |
| 26°C or below | 0% |
| 27°C | 0% |
| 28°C | 0% |
| 29°C | 0% |
| 30°C | 0% |
| 31°C | 0% |
| 32°C | 0% |
| 33°C | 0% |
Market context
Kuala Lumpur’s airport high on 10 August is the real settlement question, and the market’s 0% yes-implied price makes the favourite a temperature range below the city’s usual mid-30s Celsius ceiling, with the contract still exposed to a late-day spike if sunshine holds. The consensus in the market is clustered around the low 30s Celsius, which fits the broader August climatology: historical August averages for Kuala Lumpur are around 30–31°C for highs, while the airport’s monthly normals are also near 30°C/86°F.[9][12][16]
Recent and historical comparables point to a fairly tight band rather than an extreme print. Weather Underground’s Kuala Lumpur history shows a typical early-August high near 91°F, with a record high of 96°F on that page, while yesterday’s actual maximum at the city level was 93°F, underscoring that low- to mid-30s Celsius remains the live zone when convection is limited.[4][2] The value angle, if any, sits against the market’s sharp dismissal of the top end: 33°C has been the frontrunner on Polymarket, with 34°C still carrying a meaningful slice of the book, which suggests traders see heat but not enough certainty to rule out a one-step overshoot.[10]
For catalysts, the key dependency is the day’s rainfall and cloud cover rather than any scheduled announcement. Malaysia’s meteorological forecast for Kuala Lumpur calls for no rain across morning, afternoon and night with a 33°C maximum, while the immediate forecast layer also points to isolated thunderstorms and a 67% chance of rain, which is exactly the sort of split that can leave the day’s peak temperature hostage to timing.[11][19] The primary resolution source is Weather Underground’s Daily Observations table, so traders should watch the airport station’s actual hourly trace rather than summary headlines, because a brief afternoon burst or a delayed convective cell can decide whether the winning range lands one notch higher or lower.[4]
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
At resolution the UMA oracle takes over: a proposer posts the outcome with a bond, any token holder can dispute within two hours. Without dispute the result is accepted and the smart contract distributes USDC instantly.
On Kalshi (CFTC-regulated) resolution runs through their in-house clearing engine in USD. Betfair Exchange settles after match end in the account's local currency. Manifold pays no cash — only its in-platform "mana" currency.
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 Kuala Lumpur on August 10? on Who Will Win
Live order book, 0% fees, USDC settlement in seconds.
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