Highest temperature in Seoul on June 13?

Platform comparison

Active sub-markets

Market context

Seoul's highest temperature on 13 June 2026 will be recorded at Incheon International Airport Station and resolved against historical weather data from Wunderground. The settlement window closes at midday UTC on that date, meaning traders must commit positions before the full diurnal cycle completes. This timing constraint differs materially from how Kalshi structures its weather markets, which often allow resolution after the full calendar day has passed, giving traders additional certainty on final readings.

June temperatures in Seoul cluster between 24–28°C historically, with occasional peaks above 30°C during early-summer heat waves. The 0% crowd probability reflected here suggests either extreme confidence in a specific temperature band or sparse liquidity at the tails. Comparable Betfair markets on Korean weather show similar clustering patterns, though Betfair's decimal-odds interface (1.01–2.00 range) can obscure tail probabilities that appear more transparent on Polymarket's percentage scale. Smarkets' fractional-odds format introduces a third visual convention that some traders find clearer for assessing edge on low-probability outcomes.

Traders should monitor the Korean Meteorological Administration's forecasts released in early June and watch for any El Niño or monsoon-pattern shifts that could push temperatures above the 30°C threshold. Polymarket's KYC requirements remain less restrictive than Kalshi's for non-US traders, affecting which platforms carry active order flow on this specific settlement. Fee structures—Polymarket's 2% maker/taker versus Kalshi's variable schedule—will compress expected value on tight ranges, favouring larger position sizes on this market.

Methodology

This page compares Highest temperature in Seoul on June 13? 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 Polymarket Alternative, which mirrors the Polymarket order book at 0% fees.

Resolution & payout

Polymarket settles via UMA Optimistic Oracle on Polygon. A proposer posts the outcome with a bond, the two-hour window runs, then the smart contract pays USDC.

Kalshi settles USD through the CFTC-regulated clearinghouse — the cleanest variant, with heavier KYC. Betfair Exchange settles in account currency (GBP/EUR), net of 2-5% commission. Smarkets follows the same model as Betfair with a lower default 2% commission.

FAQ

Where can I trade this market with the lowest fees?

On Polymarket Alternative, 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?

Polymarket Alternative 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.

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.

What does it cost to trade on Polymarket Alternative?

Zero. Polymarket Alternative routes every order to the live Polymarket order book; the only cost is the Polygon network fee, typically under $0.01 per transaction.

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.