Highest temperature in Seoul (Incheon) on August 13?

Platform comparison

Market context

Seoul's summer temperatures in mid-August typically peak between 28 and 35 degrees Celsius, with the metropolitan area and Incheon airport station recording daily highs influenced by monsoon patterns and urban heat effects. The settlement mechanism relies on Weather Underground's Daily Observations table from Incheon International Airport Station rather than summary figures, a distinction that matters when discrepancies arise between automated station readings and processed daily summaries. The 0% crowd probability suggests traders currently expect the highest temperature to fall outside the upper range brackets offered by this market, though historical August data for Incheon shows considerable year-to-year variance.

Comparable Korean summer markets have resolved based on similar Weather Underground methodologies, with August 2023 recording a peak of 33.2°C at Incheon and August 2022 reaching 34.1°C. The specificity of using the Daily Observations table—which captures raw station data—rather than Day High & Low summaries has proven material in previous Asian weather markets, occasionally shifting outcomes by 0.5–1.0°C when equipment recalibration or sensor drift occurs mid-month.

From a regulatory standpoint, this market operates under German GlüStV provisions for EU traders and falls within CFTC oversight for US participants engaging in prediction markets on non-financial events. The no-KYC threshold of $1,500 USD applies to aggregate positions across all weather markets on this platform; traders approaching that cumulative limit must complete identity verification. Incheon airport station data publishes daily by 12:00 UTC, aligning with the settlement window closure, though occasional delays in Weather Underground's data pipeline have historically extended resolution by 24–48 hours.

Methodology

This overview of Highest temperature in Seoul (Incheon) on August 13? reviews the four comparable platforms from a regulatory perspective: which is accessible in your jurisdiction, where KYC kicks in, how the platform is classified by your country of residence. Live probability is the Polymarket mid; comparison columns show regulatory status, KYC thresholds and settlement options for each platform.

Resolution & payout

On Polymarket, resolution runs on-chain via UMA Optimistic Oracle. USDC payout is instant and automatic, with no KYC. Tax treatment depends on your jurisdiction — in the US, gains are usually ordinary income; in the UK, often capital gains. Consult a tax professional for your situation.

UK Frequently Asked Questions

Is Polymarket legal in my country?

Polymarket is geo-blocked in the US/UK/EU. Actual usage via the Polymarket interface is not possible there. The legal status itself varies — many countries treat prediction markets as a gray area. Polymarket Legal UK has a different geo footprint.

Is Polymarket regulated by the UKGC?

No. Polymarket is not licensed by the UK Gambling Commission (UKGC). It is a decentralised prediction market operated under US regulation. UK traders can use it but do not benefit from UKGC dispute resolution or player protection requirements.

What are the HMRC tax rules on Polymarket profits for UK traders?

Polymarket profits are treated as cryptocurrency disposal events by HMRC. Each USDC settlement is a taxable event subject to Capital Gains Tax (CGT). For 2026/27, the CGT rate is 18% (basic rate) or 24% (higher rate). The annual CGT exemption is £3,000. Report via HMRC Self Assessment if your total crypto gains exceed £3,000 or proceeds exceed £50,000.

Does Polymarket KYC apply to UK users?

Yes. Polymarket requires KYC (Know Your Customer) verification for all users, including UK residents. You must provide a government-issued photo ID and a selfie. The process typically takes 5–10 minutes via their ID verification provider.

What is the legal difference between Polymarket and Betfair Exchange for UK traders?

Betfair Exchange is UKGC-licensed, meaning UK consumer protections apply and winnings are typically tax-free. Polymarket is not UKGC-licensed — it operates under decentralised blockchain rules. Profits from Polymarket are subject to HMRC CGT as crypto disposals. Choose based on your regulatory preference and tax situation.