Highest temperature in Seoul on June 4?

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Market context

Seoul's weather on 4 June 2026 will be measured at Incheon International Airport's official station, with the day's peak temperature determining which range resolves YES. The 0% crowd probability reflects genuine uncertainty: early June sits at the threshold between spring and the onset of the East Asian monsoon season, making temperature forecasts inherently volatile across a two-year horizon. Polymarket has priced this contract to reflect that unpredictability, with conditional tokens on Polygon currently valuing any single temperature band as negligible until nearer the settlement date.

Historical Seoul weather data shows early June typically ranges between 18°C and 28°C, though outliers occur regularly. The 2023 and 2024 records for this period reveal considerable year-to-year variation: 2023 saw a peak of 29.8°C on 4 June, whilst 2024 recorded 25.1°C for the same date. This five-degree spread illustrates why traders cannot rely on simple seasonal averages. Incheon Airport's coastal location moderates extremes compared to central Seoul, but the station remains sensitive to warm air masses pushing northward from the Pacific.

Traders monitoring this contract should track El Niño and La Niña indices through early 2026, as these patterns influence East Asian temperature anomalies months in advance. The Korean Meteorological Administration publishes seasonal outlooks each quarter; their March 2026 forecast will provide the first concrete signal of whether June conditions favour above or below historical norms. Proximity to the settlement window will sharpen probability estimates, but current pricing reflects the genuine difficulty of pinpointing a single day's peak temperature two years ahead.

Methodology

This page reviews Highest temperature in Seoul on June 4? across five venues. We show live odds for Polymarket-based markets (sourced from the Polygon order book); for other venues we list platform attributes, since the comparable contracts are not exposed via a public API on every venue. Every CTA points at Polymarket Legit? — the application we operate, where you trade directly against 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.

FAQ

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 Legit??

Zero. Polymarket Legit? 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.

Do I need to KYC for this market?

Not under $1,500 of lifetime trading volume. Above that threshold, Polymarket Legit? 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.