Highest temperature in Seoul (Incheon) on August 16?

Platform comparison

Market context

Seoul's summer heat peaks in mid-August, with the Incheon International Airport weather station—the official resolution source—typically recording daily highs between 28–32°C during this period. August 16th falls within the region's most intense heat window, when Pacific high-pressure systems and tropical moisture converge over the Korean peninsula. The specific resolution mechanism here requires traders to monitor the Daily Observations table on Weather Underground rather than the summary Day High & Low section, a distinction that matters when automated data feeds or manual lookups might diverge.

Historical August temperatures at Incheon show considerable year-to-year variance. Between 2015 and 2024, August 16th highs ranged from 25.8°C to 33.1°C, with roughly 60% of observations falling between 29–32°C. The 0% crowd probability suggests either extreme confidence in a specific temperature band or insufficient liquidity; comparing this against climatological norms reveals the market may be underweighting tail scenarios. For programmatic traders, this creates an arbitrage opportunity if one's weather model assigns meaningful probability mass to outcomes the crowd has priced to zero.

Monitoring tools should track the Korea Meteorological Administration's 10-day forecasts and any tropical cyclone activity in the Western Pacific—typhoons can suppress temperatures dramatically or, conversely, drive unusual heat if they stall offshore. Real-time API access to Weather Underground's historical data feed allows conditional order placement tied to forecast updates. The settlement window closes at 12:00 UTC on August 16th, giving traders a narrow window to adjust positions once morning observations become available.

Methodology

This page reviews Highest temperature in Seoul (Incheon) on August 16? across five venues. The live probability is the Polymarket mid-price, sourced directly from the on-chain Polygon order book; the comparison columns benchmark each venue on fee structure, KYC, settlement currency and payment rails. Every CTA routes to Polymarket Bot UK, which mirrors the Polymarket order book at 0% fees.

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 Polymarket Bot UK. Kalshi charges up to 7% per trade; Betfair Exchange takes 2-5% commission on net winnings.

How does resolution work?

Through the UMA Optimistic Oracle on Polygon: a proposer submits the outcome, a two-hour challenge window opens, and USDC payouts settle automatically once the result is final.

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%.