Highest temperature in Seoul on May 23?

Platform comparison

Active sub-markets

Market context

Seoul's weather on 23 May 2026 will depend on late spring atmospheric patterns across the Korean peninsula, with the highest temperature at Incheon International Airport Station serving as the settlement reference. Late May in Seoul typically sits in the warm season, with daily highs ranging from 24°C to 28°C based on thirty-year climate normals, though outlier days occasionally exceed 30°C during early heat waves or unusual pressure systems.

Historical May 23rd records for the Seoul metropolitan area show considerable year-to-year variation. The highest temperature recorded on this specific date across recent decades has ranged from 19°C in cooler years to 31°C during warmer springs, reflecting the transitional nature of late May weather in East Asia. Comparable dates in the surrounding week typically see similar ranges, with early summer heat waves occasionally pushing readings into the low-to-mid 30s Celsius when subtropical air masses dominate the region.

Traders monitoring this market should track seasonal weather forecasts released by the Korea Meteorological Administration in the weeks preceding 23 May, particularly any signals of high-pressure systems or tropical moisture patterns. Upper-atmosphere circulation patterns and sea-surface temperatures in the Yellow Sea will influence whether typical spring conditions prevail or whether anomalous warmth develops. Real-time forecast models from major meteorological centres will narrow uncertainty substantially in the days immediately before settlement, with the final settlement determined by recorded observations at Incheon rather than forecasted values.

Methodology

This page reviews Highest temperature in Seoul on May 23? 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 PolyGram — the application we operate, where you trade directly against the Polymarket order book at 0% fees.

Resolution & payout

At resolution the UMA oracle takes over: a proposer posts the outcome with a bond, any token holder can dispute within two hours. Without dispute the result is accepted and the smart contract distributes USDC instantly.

On Kalshi (CFTC-regulated) resolution runs through their in-house clearing engine in USD. Betfair Exchange settles after match end in the account's local currency. Manifold pays no cash — only its in-platform "mana" currency.

FAQ

Is this market available outside the US?

PolyGram 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.

What does it cost to trade on PolyGram?

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

Do I need to KYC for this market?

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