Highest temperature in Taipei on August 8?

Platform comparison

Market context

Polymarket is pricing this Taipei heat contract on Polygon with USDC collateral and conditional tokens, and the current crowd-implied probability sits at **0% YES**. That implies traders are assigning no meaningful chance that the Taipei Songshan Airport station’s highest observed temperature in Weather Underground’s Daily Observations table will land in the listed higher bands, even though the market is still open until the settlement window closes.

For context, Taipei in August is normally hot enough that upper-20s to low-30s Celsius is routine, with climate guides commonly putting monthly daytime highs around 32–34°C and forecasts for early August often clustering near 30–33°C.[5][6][11][13] Weather Underground’s own market wording matters here: settlement depends on the *Daily Observations* table, not the summary “Day High & Low” figure, so traders should watch the station-level readings rather than the headline daily maximum. That distinction can matter if the summary refreshes differently from the observations table, especially on a day with showers, brief sunbreaks, or late-afternoon heat.

The main catalysts are the intraday temperature track, cloud cover, rainfall timing, and any local weather shifts around Taipei Songshan Airport before the settlement cut-off. Recent public forecasts for 8 August have pointed to showers and temperatures around the high-20s Celsius rather than extreme heat, which helps explain the market’s current bias away from the upper bands.[10][12] In practice, a Polymarket user watching this contract should track whether the station reaches the low-30s before midday and whether Wunderground’s observations page updates cleanly, because the final tick in the table is what determines which temperature range wins.

Sources: 1 · 2 · 3 · 4 · 5

Methodology

We track Highest temperature in Taipei on August 8? 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

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

Where can I trade this market with the lowest fees?

Polymarket is geo-blocked in the US/UK/EU. The easiest 0%-fee broker into the same order book is PolyGram. Kalshi charges up to 7% per trade; Betfair Exchange takes 2-5% commission on net winnings.

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%.