Highest temperature in Seoul (Incheon) on August 9?

Platform comparison

Market context

The relevant event is the day’s **maximum temperature at Incheon International Airport Station** on 9 August, as recorded in Weather Underground’s Daily Observations table rather than the summary high/low. Current weather pages point to a hot midsummer setup around Seoul, with forecasts clustering in the low-to-mid 30s °C and some showers or overcast periods, which makes the settlement range primarily a question of the exact observation bucket rather than whether it is a warm day at all.[2][5][7][9][12]

That is consistent with the broader August pattern, when Seoul is typically one of the hottest periods of the year and historical August averages sit well above 20°C overnight and around the high 20s to low 30s by day.[16][17][18] For probability reading, prior outcomes on similar summer temperature markets usually hinge on whether the forecast peak lands just above or below a band threshold, so a 0% YES implies the market is priced as if the recorded airport maximum will stay outside the target range unless late-day heating materially exceeds the current forecast envelope.[2][5][7][9]

From a market-access angle, German GlüStV treatment matters because prediction markets can be constrained as gambling-style products under German law, even where the underlying event is plainly weather-related; that affects platform availability and onboarding more than the meteorology itself. US CFTC reach is the other regulatory overhang, since US persons and US-facing activity may fall within derivatives-style scrutiny depending on venue structure. “No-KYC up to $1,500” generally means a user can trade up to that cumulative amount without identity verification, which improves access for small positions in this market, but it does not remove jurisdictional restrictions or tax reporting obligations.

Sources: 1 · 2 · 3 · 4 · 5

Methodology

This overview of Highest temperature in Seoul (Incheon) on August 9? 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

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UK Frequently Asked Questions

Is Polymarket legal in my country?

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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.