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Highest temperature in Seoul (Incheon) on August 12?

"Highest temperature in Seoul (Incheon) on August 12?" — odds, fees, regulatory status. Polymarket Tax UK as a Polymarket alternative.

32°C 100% 27°C or below 0% 28°C 0% 29°C 0% Volume: $112K Liquidity: $169K Closes: 12 Aug 2026
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Highest temperature in Seoul (Incheon) on August 12?

Platform comparison

PlatformYES oddsNO oddsFeeKYCSettlement
Polymarket (via Polymarket Tax UK) Pick
polygram.ink (preferred broker)
100% 0% 0% (USDC on-chain) No-KYC up to $1,500 USDC, auto via UMA oracle Trade this market →
Polymarket (direct)
polymarket.com
100% 0% 0% Geo-blocked in US/UK/EU USDC, on-chain Trade this market →
Kalshi
kalshi.com
Up to 7% per trade US-only, KYC required USD Trade this market →
Betfair Exchange
betfair.com
2-5% commission Full KYC from first trade GBP / EUR Trade this market →
Manifold Markets
manifold.markets
Play-money (mana) None — play-money Mana (no cash-out) Trade this market →

Outcome probabilities

Current market-implied probability for each outcome, from the live order book.

OutcomeProbability
32°C100%
27°C or below0%
28°C0%
29°C0%
30°C0%
31°C0%
33°C0%
34°C0%
35°C0%
36°C0%
37°C or higher0%

Market context

On 12 August 2026, the highest temperature recorded at Incheon International Airport Station will fall into one of several defined ranges. Seoul's summer climate typically peaks in late July and early August, with August highs averaging 29–31°C, though extreme heat events can push readings above 35°C. The market resolves using Weather Underground's Daily Observations table rather than summary figures, a distinction that matters when automated systems or manual corrections create discrepancies between data sources.

Historical August temperature records for Seoul show considerable year-to-year variation. The city experienced a 39.6°C peak in August 2018 during an exceptional heat wave, whilst cooler Augusts have seen highs near 28°C. Current crowd probability sitting at 0% suggests either extreme confidence in a specific temperature band or sparse liquidity; comparable weather markets often show low probabilities for outlier ranges rather than genuine zero-likelihood events. Incheon's coastal location moderates temperatures slightly compared to central Seoul, typically reducing peaks by 1–2°C.

Traders should monitor meteorological forecasts from the Korea Meteorological Administration and international weather services from late July onwards, as August heat patterns depend heavily on Pacific typhoon activity and high-pressure systems over East Asia. The settlement window closes at 12:00 UTC on 12 August 2026, meaning final temperature readings must be confirmed by that deadline. From a regulatory standpoint, this market falls under German GlüStV provisions if accessed from Germany, whilst US CFTC jurisdiction applies to US-based participants; the no-KYC threshold of $1,500 means smaller positions can be placed without identity verification on platforms offering that structure, though larger stakes require full compliance documentation.

Methodology

This overview of Highest temperature in Seoul (Incheon) on August 12? 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 Tax 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.
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