Highest temperature in Taipei on August 18?

Platform comparison

Market context

Taipei's highest temperature on 18 August 2026 will be measured at Songshan Airport Station and recorded in Weather Underground's Daily Observations table, with the contract currently pricing at 0% across all temperature ranges on Polygon. The settlement hinges on a specific data source—WU's granular observation logs rather than their summary high-low figures—meaning traders must track the precise hourly readings that day rather than relying on the simplified forecast graphics most weather apps display.

August in Taipei typically peaks between 33–36°C, with the city's urban heat island effect and proximity to the Taiwan Strait creating volatile intra-day swings. Historical data from the past five years shows Songshan Airport recordings frequently exceed 35°C during mid-August, though extreme heat events pushing above 37°C occur roughly once every two to three years. The 0% crowd probability suggests either deep scepticism about extreme heat materialising that specific day or minimal liquidity in this particular contract; comparable August temperature markets in subtropical regions have historically settled across the full range of bins rather than clustering at zero.

Traders should monitor Taiwan's Central Weather Administration forecasts from early August, particularly their 10-day outlooks issued in the week preceding settlement. Typhoon activity in the Western Pacific during late July and early August could suppress temperatures significantly, whilst high-pressure systems anchored over East Asia would drive readings toward the upper end. The USDC settlement on Polygon will execute once WU publishes its final Daily Observations table for 18 August, typically within 24 hours of midnight Taipei time.

Methodology

This page reviews Highest temperature in Taipei on August 18? across five venues. The live probability is the Polymarket mid-price, sourced directly from the on-chain Polygon order book; the comparison columns benchmark each venue on fee structure, KYC, settlement currency and payment rails. Every CTA routes to Polymarket Alternative UK, which mirrors the Polymarket order book at 0% fees.

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 Polymarket Alternative UK. Kalshi charges up to 7% per trade; Betfair Exchange takes 2-5% commission on net winnings.

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.

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%.