Highest temperature in Taipei on August 8?

Platform comparison

Market context

Polymarket is pricing the Taipei temperature contract at **0% YES**, which means the conditional tokens are currently treated as almost worthless for any upside on the higher-temperature ranges while USDC stays parked on Polygon until resolution. The underlying event is straightforward: traders are betting on the **highest observed temperature** at Taipei Songshan Airport, and settlement depends on the **Weather Underground Daily Observations table**, not the summary high/low figure.

Historically, Taipei can still print very warm August highs even when forecasts lean wetter. August averages are around 30°C/86°F, with typical highs near 34°C/93°F and recorded extremes above 39°C, including 39.3°C on 8 August 2013. That makes the current 0% pricing a statement about today’s market balance, not about the city’s climate baseline; in past Polymarket temperature markets on Taipei, traders have also seen late repricing once the day’s actual observations began to come in.[2][3][4][19]

The main catalysts are the live observations through the day, especially any rapid shift in Taipei’s weather pattern, because the contract resolves from the airport station data rather than a forecast page. Current forecasts from AccuWeather and Time and Date point to rain, thunderstorms, and highs around 88–90°F, which would tend to cap the upside unless the station briefly spikes above expectation before the settlement window closes.[7][8][16] The practical trade question is whether the daily observations ever move into the next Celsius band before final readout.

Sources: 1 · 2 · 3 · 4 · 5

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

Polymarket-based markets settle through the UMA Optimistic Oracle on Polygon. A proposer submits the outcome, a two-hour challenge window opens, and unchallenged proposals finalise the resolution. Payouts settle automatically in USDC the moment the result is final — no bookmaker, no delay.

Kalshi-based markets settle in USD via the CFTC-regulated clearinghouse. Betfair Exchange settles in GBP/EUR net of commission. Manifold is play-money and does not pay out real funds.

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%.