Highest temperature in Seoul on May 31?

Platform comparison

Active sub-markets

Market context

On 31 May 2026, the highest temperature recorded at Incheon International Airport Station will fall into one of several defined ranges. The settlement will draw from Wunderground's historical weather database, which archives daily extremes for this major Seoul-area weather station. The 0% crowd probability suggests traders currently see no meaningful conviction in any single temperature band, or the market has insufficient liquidity to establish differentiated odds across the available brackets.

Seoul's late May climate typically sits in the warm-to-hot range, with historical highs around 28–32°C, though anomalies occur. Comparing this market across platforms reveals structural differences: Polymarket displays implied probabilities directly, whilst Kalshi and Betfair present decimal odds requiring conversion. Smarkets similarly uses decimal odds but offers tighter spreads on weather contracts in some regions. KYC requirements vary—Polymarket requires US residency or specific jurisdictions, Kalshi operates under CFTC oversight with broader US access, and Betfair/Smarkets serve UK and European traders more readily. Fee structures diverge too: Polymarket charges 2% on winnings, Kalshi takes 0–2% depending on volume, and Betfair's commission scales with liquidity.

Traders should monitor South Korean meteorological forecasts from late May, particularly any alerts regarding heat waves or unusual pressure systems. The Korea Meteorological Administration publishes 10-day outlooks that typically solidify 5–7 days before month-end. Seasonal patterns—including the onset of early monsoon activity—can suppress or elevate temperatures. The current zero probability likely reflects the market's nascent stage rather than genuine consensus that all temperature ranges are impossible.

Methodology

This page compares Highest temperature in Seoul on May 31? 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 UK, which mirrors the Polymarket order book at 0% fees.

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 UK 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 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.

What does it cost to trade on Polymarket Alternative UK?

Zero. Polymarket Alternative UK 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 Alternative UK 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.