Highest temperature in Seoul on May 30?

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Market context

The market is pricing zero probability that Seoul's highest temperature on 30 May 2026 will fall into any single range bracket, suggesting either extreme uncertainty about which bin will resolve or a liquidity constraint preventing meaningful positions. The settlement mechanism relies on Wunderground's historical data feed for Incheon International Airport Station, the official reference point for Seoul-area temperature records, with resolution occurring at 12:00 UTC on the day itself. Traders holding conditional tokens on Polygon will need to monitor the actual recorded high as it updates through the day, with USDC settlement following once the final measurement is confirmed.

Late May in Seoul typically sees highs between 24–28°C, though the range can extend from 20°C on cooler days to 32°C during early heat waves. Historical data from the past decade shows 30 May specifically has produced highs ranging from 22°C to 29°C, with most years clustering around 25–27°C. The 0% crowd probability likely reflects that no single temperature bracket has accumulated sufficient backing rather than genuine forecasting consensus, making this a market where early position-taking could establish price discovery.

The primary catalyst is the East Asian weather pattern developing through May 2026, particularly the position of the North Pacific high-pressure system and any tropical moisture advection from the south. South Korea's Meteorological Administration will issue extended forecasts in early May that traders should monitor for signals about whether a ridge of high pressure or a trough will dominate the peninsula on that specific date. Seasonal transition dynamics—with late May marking the shift toward summer monsoon season—mean that even small shifts in atmospheric steering can push temperatures across the typical range.

Methodology

This page reviews Highest temperature in Seoul on May 30? 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 Kalshi UK — 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

Is this market available outside the US?

Kalshi 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.

Do I need to KYC for this market?

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