Highest temperature in Kuala Lumpur on August 16?

Platform comparison

Market context

The market centres on the highest temperature recorded at Kuala Lumpur International Airport on 16 August 2026, with settlement based on the Daily Observations table from Weather Underground rather than summary figures. The crowd currently assigns zero probability to any outcome, suggesting either extreme uncertainty or insufficient liquidity to establish a baseline view.

Kuala Lumpur's August climate is remarkably consistent. Historical data from the airport station shows daily highs typically cluster between 32–34°C, with extreme readings above 35°C occurring in roughly 5–10% of August days over the past two decades. The 0% implied probability reflects the market's nascent state rather than any genuine forecasting signal; traders should examine which temperature bands carry the most plausible outcomes given the city's equatorial monsoon pattern and the specific resolution methodology tied to airport observations, which often record slightly lower maxima than urban centre stations.

The critical dependency is the monsoon phase active in mid-August 2026. The Southwest Monsoon typically dominates through August, bringing cloud cover and occasional afternoon convection that can suppress peak temperatures. Conversely, any temporary high-pressure system or break in cloud cover could push readings toward the upper end of the historical range. Traders should monitor seasonal forecasts from Malaysia's Meteorological Department as August approaches, though such predictions remain unreliable beyond two weeks. The resolution source specification—prioritising Daily Observations over Day High & Low summaries—matters operationally but rarely produces material discrepancies at this airport station.

Methodology

Methodologically we separate two layers: the live probability (Polymarket mid-price) and the platform attributes (fee, KYC, settlement currency, payment rails). That keeps the comparison honest — a single canonical probability across the row, with the venue-by-venue trade-offs spelt out in the columns next to it.

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

Is this market available outside the US?

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How does resolution work?

Through the UMA Optimistic Oracle on Polygon: a proposer submits the outcome, a two-hour challenge window opens, and USDC payouts settle automatically once the result is final.

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%.