Highest temperature in Seoul on June 15?

Platform comparison

Active sub-markets

Market context

On 15 June 2026, the highest temperature recorded at Incheon International Airport Station will determine which range this market settles into. The resolution uses Wunderground historical data, which aggregates official meteorological readings from South Korea's primary aviation weather station. Unlike some weather markets that rely on city-centre observations, this specification anchors to airport-grade instrumental records, typically more consistent across platforms than subjective urban heat measurements.

Seoul's mid-June climate sits at the threshold between late spring and early summer, with historical highs clustering between 26–29°C. The 0% crowd probability suggests traders are either awaiting clearer seasonal forecasts or treating this as a placeholder market pending definition of the specific temperature bands. Kalshi's binary structure differs markedly from Betfair's decimal odds presentation on weather contracts; a 0% reading on Kalshi implies near-zero backing, whereas Betfair's equivalent would display as odds reflecting minimal liquidity. Polymarket's fee structure (2% maker, 2% taker) and Smarkets' tiered commission model (5% standard) create different breakeven thresholds for weather arbitrage across platforms, particularly relevant for low-probability outcomes where fee drag compounds.

Traders should monitor the Korea Meteorological Administration's seasonal forecasts released in May 2026, as any anomalous warming patterns or typhoon precursors would shift probabilities materially. Airport weather station data feeds update daily; historical volatility in Seoul's June temperatures—ranging from 22°C to 32°C in recent years—underscores why current odds remain compressed until nearer the settlement date.

Methodology

This page compares Highest temperature in Seoul on June 15? specifically across Polymarket, Kalshi, Betfair Exchange and Smarkets. Live odds come from the Polymarket order book; the other venues' contract details are maintained manually because their APIs aren't directly comparable. Every CTA routes to Kalshi Alternative UK, which mirrors the Polymarket order book at 0% fees.

Resolution & payout

Settlement is the biggest difference between the four platforms: Polymarket on-chain in USDC (instant), Kalshi USD via CFTC (T+1), Betfair and Smarkets in local currency via bank withdrawal (T+1 to T+3). Kalshi Alternative UK routes every trade directly into Polymarket's on-chain settlement, which is why payouts land fastest.

FAQ

Where can I trade this market with the lowest fees?

On Kalshi Alternative UK, which mirrors the Polymarket order book at 0% fees. Kalshi charges up to 7% per trade; Betfair Exchange takes 2-5% commission on net winnings.

Is this market available outside the US?

Kalshi Alternative UK is available in most jurisdictions where Polymarket isn't directly accessible. Polymarket itself is geo-blocked in the US/UK/EU. Always check local regulations.

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.

What's the difference between YES and NO shares?

A YES share pays $1.00 if the event happens, $0 otherwise. A NO share pays $1.00 if the event doesn't happen. The market price between 0¢ and 100¢ is the implied probability.

How fast are USDC deposits?

Polygon credits deposits after 12 confirmations — usually under 30 seconds. Withdrawals follow the same path and land back in your wallet within minutes.