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Highest temperature in Busan on August 17?

"Highest temperature in Busan on August 17?" on Polymarket, Kalshi and Polymarket Tax UK — what traders need to know about platform choice, KYC and tax law.

26°C 97% 27°C 3% 28°C 1% 21°C or below 0% Volume: $71K Liquidity: $139K Closes: 17 Aug 2026
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Highest temperature in Busan on August 17?

Platform comparison

PlatformYES oddsNO oddsFeeKYCSettlement
Polymarket (via Polymarket Tax UK) Pick
polygram.ink (preferred broker)
97% 3% 0% (USDC on-chain) No-KYC up to $1,500 USDC, auto via UMA oracle Trade this market →
Polymarket (direct)
polymarket.com
97% 3% 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
26°C97%
27°C3%
28°C1%
21°C or below0%
22°C0%
23°C0%
24°C0%
25°C0%
29°C0%
30°C0%
31°C or higher0%

Market context

Busan's highest temperature on 17 August 2026 will be measured at Gimhae International Airport Station and recorded in Weather Underground's Daily Observations table. The settlement window closes at 12:00 UTC on that date, meaning the final reading must be captured before noon. This market resolves to a specific temperature range bracket rather than an exact figure, with the Daily Observations dataset taking precedence over Weather Underground's summary high-low section should any discrepancy arise.

August temperatures in Busan historically cluster between 28–32°C, with occasional peaks above 33°C during heat waves. The 0% crowd probability suggests traders are either absent or treating this as a baseline reference point rather than an outlier event. Comparable August days at Gimhae show that extreme heat (above 35°C) occurs roughly once per decade in this region, whilst readings below 26°C are exceptionally rare. The current probability assignment reflects typical late-summer conditions rather than any specific meteorological warning.

Traders should monitor the Korea Meteorological Administration's forecasts from mid-August, particularly any heat advisory issuance in the week preceding settlement. Typhoon activity in the Western Pacific during early-to-mid August could suppress temperatures significantly, whilst high-pressure systems anchored over the Korean peninsula would drive readings upward. Sea-surface temperatures in the Korea Strait and any upper-level atmospheric patterns will determine whether Busan experiences typical summer warmth or anomalous conditions. Real-time forecast updates become actionable only from approximately 72 hours before the settlement window.

Methodology

This overview of Highest temperature in Busan 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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