Highest temperature in Taipei on August 16?

Platform comparison

Market context

On 16 August 2026, the highest temperature recorded at Taipei Songshan Airport Station will determine which Celsius range resolves as correct. The market currently shows 0% implied probability, suggesting traders expect the actual high to fall outside the uppermost temperature bracket offered. Settlement occurs via USDC on btc-prediction.bet following the close of the trading window at 12:00 UTC that day, with Weather Underground's Daily Observations table serving as the binding resolution source rather than summary figures.

Taipei's August climate is remarkably consistent. Historical data from the past two decades shows daily highs in mid-August cluster between 32–35°C, with extreme readings above 36°C occurring in fewer than 5% of cases. The 2023 heatwave pushed Taipei to 38.3°C on 18 August, but such outliers remain rare. Current zero probability on the highest bracket suggests the market has priced in typical August conditions, reflecting seasonal norms rather than tail-risk scenarios.

Traders should monitor tropical cyclone forecasts issued by the Central Weather Administration Taiwan in early August, as typhoons can suppress temperatures by 2–4°C through cloud cover and precipitation. Urban heat island effects around the airport station may amplify readings on clear, windless days. Any significant weather system tracking toward Taiwan in the fortnight before settlement would alter the distribution of likely outcomes and potentially shift implied probabilities away from the current consensus.

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

What are crypto prediction markets?

Crypto prediction markets are on-chain smart contracts where you buy YES or NO shares on a future crypto event (e.g. "BTC above $100k by year-end"). The market price between 0¢ and 100¢ is the implied probability.

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.

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%.