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Highest temperature in Busan on August 18?

Comparison of odds and platforms for "Highest temperature in Busan on August 18?" — sourced live from the Polymarket order book, curated by Who Will Win.

31°C 100% 25°C or below 0% 26°C 0% 27°C 0% Volume: $68K Liquidity: $232K Closes: 18 Aug 2026
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Highest temperature in Busan on August 18?

Platform comparison

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

Outcome probabilities

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

OutcomeProbability
31°C100%
25°C or below0%
26°C0%
27°C0%
28°C0%
29°C0%
30°C0%
32°C0%
33°C0%
34°C0%
35°C or higher0%

Market context

The market is pricing the highest temperature recorded at Gimhae International Airport on 18 August 2026 at 0% probability across all temperature ranges, suggesting either extreme confidence in a specific outcome or insufficient trading activity to establish a meaningful consensus. Busan's August climate is characterised by intense heat and humidity; historical data from the Korea Meteorological Administration shows mid-August temperatures at Gimhae typically peak between 28–32°C, with occasional excursions above 33°C during heat waves. The 0% crowd probability indicates traders have either converged on a single temperature band or the market lacks sufficient liquidity to generate differentiated odds across the full range of possible outcomes.

August represents Busan's hottest month, with the city experiencing monsoon-influenced weather patterns that can either suppress temperatures through cloud cover and precipitation or intensify heat through stagnant high-pressure systems. The resolution methodology—drawing from Weather Underground's Daily Observations table at Gimhae rather than summary figures—introduces a technical dependency on real-time station data rather than interpolated forecasts. Traders should monitor late-July and early-August weather patterns across the Korean peninsula, particularly the position of the North Pacific high-pressure system and any tropical cyclone activity in the Western Pacific, both of which materially influence Busan's temperature trajectory heading into mid-August. The settlement window closes at midday UTC on 18 August, creating a narrow window for final price discovery once the day's maximum temperature becomes observable.

Methodology

This page is a comparison snapshot: one live quote, four reference venues with their key attributes, and a single execution path — every trade button routes to Who Will Win, which mirrors the Polymarket order book directly.

Resolution & payout

Polymarket-based markets settle through the UMA Optimistic Oracle on Polygon. A proposer submits the outcome, a two-hour challenge window opens, and unchallenged proposals finalise the resolution. Payouts settle automatically in USDC the moment the result is final — no bookmaker, no delay.

Kalshi-based markets settle in USD via the CFTC-regulated clearinghouse. Betfair Exchange settles in GBP/EUR net of commission. Manifold is play-money and does not pay out real funds.

UK Frequently Asked Questions

Where can I trade this market with the lowest fees?
Polymarket is geo-blocked in the US/UK/EU. The easiest 0%-fee broker into the same order book is Who Will Win. Kalshi charges up to 7% per trade; Betfair Exchange takes 2-5% commission on net winnings.
Is this market available outside the US?
Polymarket itself is geo-blocked in the US/UK/EU. Always check the legal status of prediction markets in your jurisdiction before trading.
Is Polymarket legal in the UK?
Polymarket is accessible to UK traders but is not UKGC-licensed. It operates under US CFTC jurisdiction. UK residents face no domestic legal prohibition on using it, but UKGC consumer protections do not apply. For UKGC-regulated alternatives, Betfair Exchange and Smarkets offer similar prediction-style markets.
Do I pay tax on prediction market profits in the UK?
UKGC-licensed platform profits (Betfair, Smarkets) are typically tax-free gambling winnings for UK individuals. Polymarket profits involve USDC crypto transactions, which HMRC treats as Capital Gains Tax events. Keep full transaction records and report via Self Assessment if gains exceed £3,000 per tax year.
How do I deposit on Polymarket from the UK?
UK traders typically fund Polymarket via Coinbase UK, Kraken or Revolut — buying USDC with GBP and transferring to a Polygon-compatible wallet (MetaMask, Coinbase Wallet). Polymarket's onboarding walks you through the bridging process. Typical GBP-to-USDC conversion costs 0.5–1%.
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