Highest temperature in Singapore on August 6?

Platform comparison

Market context

Singapore’s maximum temperature on 6 August will be set by the highest reading at Changi Airport, with settlement tied to the Wunderground daily history page rather than a citywide average. In tropical Singapore, August norms are tightly clustered: long-range and monthly guides point to daytime highs around 30–31°C, with lows in the mid-20s and frequent humidity, so the market is mainly about whether the day prints in the upper end of that usual band or briefly dips lower because of cloud cover or showers.[1][8][19][20]

The current 0% YES crowd price looks detached from the weather backdrop. NEA has forecast drier conditions in the first fortnight of August 2026, with fair and occasionally windy weather on several days and only localised thundery showers in the late morning and afternoon; that combination typically supports warmer afternoon highs rather than suppressing them.[10] Comparable August forecasts also cluster around 29–31°C for 6 August, while broader climate guides keep Singapore’s August daytime maxima close to 31–31.5°C, which suggests the settlement range is likely to sit near the middle of the market’s temperature ladder rather than at an extreme.[2][5][7][8]

For traders, the main live catalysts are the day’s cloud cover, shower timing, and whether any late-morning convection reaches the airport station before the afternoon peak. Because this market settles on the recorded high from the specific station and the window closes at 12:00 UTC, late local-day warming still matters if skies clear after a shower. On the crypto side, there is no obvious BTC or ETH macro driver directly linked to this contract, so pricing should mostly track weather data, not funding rates or whale flows, unless broader risk sentiment changes liquidity across prediction markets more generally.

Sources: 1 · 2 · 3 · 4 · 5

Methodology

Methodologically this overview focuses on on-chain pricing: Polymarket's live mid comes from the Polygon conditional-token order book and settles automatically in USDC. The other three venues — Kalshi, Betfair, Manifold — sit alongside as off-chain reference points so you can see how the contract translates across regulatory and settlement regimes.

Resolution & payout

Settlement is on-chain via UMA Optimistic Oracle. A proposer posts the outcome with a bond, a two-hour dispute window opens, then the smart contract lifts winning conditional tokens to 1 USDC and sends payments to holders' wallets automatically. No withdrawal fees beyond Polygon gas.

Off-chain venues (Kalshi, Betfair, Smarkets) settle in local fiat through bank-side clearing — faster than SWIFT, slower than on-chain. Manifold pays no real cash.

UK Frequently Asked Questions

Why USDC and not ETH or USDT?

USDC is the Polygon standard — audited reserves (Circle, monthly attestation), deepest order book, low gas costs. ETH volatility would distort probability quotes; USDT has thinner Polygon liquidity than USDC.

Can I use Bitcoin directly?

No, Polymarket operates exclusively in USDC on Polygon. You can bridge BTC to USDC via an exchange or bridge service and deposit on Polygon — typically 10-30 minutes processing time.

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%.