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Highest temperature in Seoul (Incheon) on August 17?

Regulatory snapshot for "Highest temperature in Seoul (Incheon) on August 17?": platform geo-block status, KYC thresholds, tax implications.

28°C 71% 29°C 26% 30°C 5% 31°C 1% Volume: $65K Liquidity: $147K Closes: 17 Aug 2026
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Highest temperature in Seoul (Incheon) on August 17?

Platform comparison

PlatformYES oddsNO oddsFeeKYCSettlement
Polymarket (via Polymarket Tax UK) Pick
polygram.ink (preferred broker)
71% 29% 0% (USDC on-chain) No-KYC up to $1,500 USDC, auto via UMA oracle Trade this market →
Polymarket (direct)
polymarket.com
71% 29% 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
28°C71%
29°C26%
30°C5%
31°C1%
32°C1%
23°C or below0%
24°C0%
25°C0%
26°C0%
27°C0%
33°C or higher0%

Market context

On 17 August 2026, the highest temperature recorded at Incheon International Airport Station will fall within one of several defined ranges, measured in degrees Celsius and sourced from Weather Underground's Daily Observations table. Seoul's August climate typically peaks between 28–32°C, though heat waves can drive readings above 35°C. The current 0% crowd probability suggests traders perceive either extreme confidence in a specific range or insufficient liquidity to establish meaningful odds across the temperature bands.

Historical August temperatures at Incheon show considerable year-to-year variation. The 30-year average high sits near 29°C, but 2018 and 2022 both recorded peaks exceeding 33°C during summer heat events. Comparable weather prediction markets on similar Asian airport stations have resolved across the full range of offered brackets, indicating that without seasonal anomalies or tropical systems, mid-range outcomes (29–32°C) carry the strongest historical precedent. The 0% reading likely reflects either a missing price discovery phase or extreme concentration in a single outcome bracket.

Traders should monitor the Korean Meteorological Administration's August forecasts and track any tropical cyclone activity in the Western Pacific, which could elevate temperatures or introduce precipitation that moderates highs. The settlement window closes 17 August 2026 at 12:00 UTC; resolution depends entirely on Weather Underground's Daily Observations record, not the Day High & Low summary. Under German GlüStV and US CFTC frameworks, weather derivatives of this specificity typically fall outside direct regulatory reach when structured as prediction markets, though UK-domiciled operators remain subject to FCA guidance. No-KYC access up to $1,500 USD generally applies to individual positions rather than aggregate account exposure, meaning traders can enter this market without full identity verification provided their single stake remains below that threshold.

Methodology

This overview of Highest temperature in Seoul (Incheon) on August 17? 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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