Highest temperature in Busan on August 15?

Platform comparison

Market context

On 15 August 2026, the highest temperature recorded at Gimhae International Airport Station in Busan will be measured and compared against predefined Celsius ranges. The market settles on the Daily Observations table from Weather Underground, with USDC settlement on-chain following the resolution window closure at 12:00 UTC that day. Current crowd pricing reflects 0% probability across all temperature brackets, suggesting either incomplete market formation or expectation of extreme heat that exceeds available range options.

Busan's August climate is consistently hot and humid, with historical daily highs typically between 28–32°C. The 0% probability signal warrants scrutiny: if all available ranges cap below 28°C, the market structure itself creates a guaranteed loss scenario for YES positions, explaining the absent liquidity. Conversely, if ranges extend above 35°C, the low probability reflects genuine confidence in moderate conditions rather than market dysfunction. Comparable August days at Gimhae show occasional peaks near 34–35°C during heat waves, but sustained temperatures above 36°C remain rare for coastal Busan despite South Korea's broader summer intensity.

Traders should monitor tropical cyclone forecasts from the Korea Meteorological Administration and Western Pacific typhoon tracking through early August 2026, as storm systems can suppress temperatures significantly. El Niño or La Niña conditions entering northern hemisphere summer will influence regional pressure patterns; current NOAA outlooks and SST anomalies warrant review by mid-2026. The specificity of using Gimhae airport data—rather than city centre readings—matters: airport stations often record lower temperatures than urban zones due to reduced heat island effects, a material distinction for range-boundary trades.

Methodology

Methodologically this overview focuses on on-chain pricing: Polymarket's live mid comes from the Polygon conditional-token order book and settles automatically in USDC. The other three venues — Kalshi, Betfair, Manifold — sit alongside as off-chain reference points so you can see how the contract translates across regulatory and settlement regimes.

Resolution & payout

Settlement is on-chain via UMA Optimistic Oracle. A proposer posts the outcome with a bond, a two-hour dispute window opens, then the smart contract lifts winning conditional tokens to 1 USDC and sends payments to holders' wallets automatically. No withdrawal fees beyond Polygon gas.

Off-chain venues (Kalshi, Betfair, Smarkets) settle in local fiat through bank-side clearing — faster than SWIFT, slower than on-chain. Manifold pays no real cash.

UK Frequently Asked Questions

What are crypto prediction markets?

Crypto prediction markets are on-chain smart contracts where you buy YES or NO shares on a future crypto event (e.g. "BTC above $100k by year-end"). The market price between 0¢ and 100¢ is the implied probability.

Can I use Bitcoin directly?

No, Polymarket operates exclusively in USDC on Polygon. You can bridge BTC to USDC via an exchange or bridge service and deposit on Polygon — typically 10-30 minutes processing time.

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%.