Highest temperature in Seoul on June 10?

Platform comparison

Active sub-markets

Market context

On 10 June 2026, the highest temperature recorded at Incheon International Airport Station will fall into one of several defined ranges, measured in degrees Celsius. The settlement hinges on historical weather data published by Weather Underground, which aggregates hourly observations from this major Seoul metropolitan weather station. The 0% crowd probability suggests traders are either absent from this market or systematically underweighting certain temperature bands relative to seasonal norms.

Seoul's early June climate sits at the threshold between late spring and early summer, with historical highs typically ranging from 26–28°C, though anomalies above 30°C occur in roughly one year per decade during this period. The Korea Meteorological Administration publishes daily forecasts and historical records that traders can cross-reference against Weather Underground's settlement source; discrepancies between these datasets have occasionally created settlement disputes on regional weather markets. Comparable markets on Polymarket and Kalshi covering East Asian temperature events have shown that crowd probabilities often compress toward middle ranges, leaving tail outcomes underpriced—a pattern worth examining here given the flat 0% reading.

Traders should monitor the Korean Meteorological Administration's extended outlook as June approaches, particularly any advisories regarding heat waves or unusual pressure systems. The settlement window closes at 12:00 UTC on 10 June, meaning afternoon temperature spikes will be captured. Unlike Kalshi's binary structure, Polymarket's range-based format here allows granular probability distribution across multiple outcomes; Betfair and Smarkets offer similar categorical pricing but differ in fee structures and liquidity depth for regional weather contracts. Early June 2026 forecasts will become actionable only in late May.

Methodology

We read Highest temperature in Seoul on June 10? from four platform perspectives: Polymarket (on-chain CLOB), Kalshi (CFTC-regulated exchange), Betfair Exchange (sports book exchange), Smarkets (peer-to-peer betting exchange). Polymarket's live quote comes directly from the Polygon order book; the other three are listed with their platform attributes — fees, KYC, settlement currency, payment options — because a 1:1 contract comparison without API access would be guesswork.

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). Polymarket Alternative routes every trade directly into Polymarket's on-chain settlement, which is why payouts land fastest.

FAQ

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.

How reliable are the quoted odds?

The YES/NO percentages are the live mid-prices of the Polymarket order book. On deep markets they move every few seconds; on thinner ones you'll see short plateaus.