Highest temperature in Seoul on June 16?

Platform comparison

Active sub-markets

Market context

Seoul's weather on 16 June 2026 will be measured at Incheon International Airport Station, with traders betting on which temperature band will contain that day's high. The settlement hinges on Wunderground's historical weather database, which records hourly observations and derives daily maxima from official meteorological stations. The 0% crowd probability suggests either extreme confidence in a specific range or minimal liquidity; Polymarket's order-book model differs markedly from Kalshi's RFQ structure, meaning price discovery here depends on whether market makers have posted competitive spreads across all temperature buckets.

June in Seoul sits within the early monsoon season, with historical highs typically ranging from 26–32°C. The Korea Meteorological Administration publishes forecasts ten days ahead, with updates every six hours; traders monitoring their English-language portal and international weather models (GFS, ECMWF) can track confidence intervals as the settlement date approaches. Unusual heat waves or tropical systems steering northward would shift probabilities sharply, though such catalysts remain unpredictable beyond a five-day window. Betfair and Smarkets, which offer decimal odds rather than Polymarket's implied-probability display, may show different liquidity patterns if European traders price this market differently than US-based participants.

The current 0% reading warrants scrutiny: it likely reflects either a single-bucket market with no competing orders, or traders' consensus around an adjacent range. Fee structures matter here—Polymarket's 2% taker fee versus Kalshi's per-contract pricing will influence whether arbitrage between platforms emerges once forecasts solidify in mid-June.

Methodology

This page compares Highest temperature in Seoul on June 16? 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.

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.

Do I need to KYC for this market?

Not under $1,500 of lifetime trading volume. Above that threshold, Polymarket Alternative triggers a quick verification flow that finishes in minutes.