Highest temperature in Taipei on August 20?

Platform comparison

Market context

On 20 August 2026, the highest temperature recorded at Taipei Songshan Airport Station will fall within a specific range measured in degrees Celsius. The market currently prices all YES outcomes at 0%, reflecting either extreme confidence in a particular temperature band or insufficient liquidity across the contract's conditional token structure on Polygon. Resolution hinges on Weather Underground's Daily Observations table rather than the Day High & Low summary, a distinction that matters when automated station readings occasionally diverge from processed forecasts.

Taipei's August temperatures cluster predictably around 32–35°C based on thirty years of meteorological records, with extreme heat days occasionally pushing toward 37–38°C during particularly intense heat waves. The 2013 heat wave saw Taipei reach 38.3°C in August, whilst more typical recent Augusts have peaked between 33–34°C. These historical bounds provide the baseline against which traders should evaluate the current 0% probability—it suggests either the market has settled on an unusually narrow expected range or the contract structure itself faces pricing friction.

Taiwan's Central Weather Administration typically issues heat advisories and updates forecasts by late July, providing traders with seasonal pattern confirmation roughly three weeks before settlement. Typhoon activity in the Western Pacific during early-to-mid August could suppress temperatures significantly, whilst high-pressure systems anchored over East Asia would drive them upward. Monitoring the CWA's official August outlook and any tropical cyclone warnings issued in the first fortnight of the month will signal which temperature bands warrant increased conditional token allocation before the settlement window closes on 20 August at 12:00 UTC.

Methodology

We track Highest temperature in Taipei on August 20? across the five venues with material prediction-market liquidity. The probability shown is the live Polymarket mid; the comparison rows summarise how each venue treats the underlying contract — fees, KYC thresholds, settlement currency, deposit options. The highlighted row marks the cheapest route into Polymarket's order book.

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?

Polymarket itself is geo-blocked in the US/UK/EU. Always check the legal status of prediction markets in your jurisdiction before trading.

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%.