Highest temperature in Seoul on June 27?

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Market context

The real-world event hinges on the highest temperature recorded at Incheon International Airport on 27 June 2026, a date falling just as South Korea’s monsoon season typically begins. Historical data for Seoul in June shows average highs between 19°C and 28°C, with the warmest day in recent years reaching 34.0°C on 19 June 2026[7]. While early June often features mild, dry conditions, the end of the month brings increasing humidity and short afternoon showers, which usually suppress peak temperatures rather than elevate them[1]. Given that 0% crowd-implied probability suggests the market expects no extreme heat, this aligns with the pattern that late June in Seoul rarely produces record-breaking highs before the full onset of monsoon rains[2].

Traders should monitor the Korea Meteorological Administration’s short-range forecasts for any unexpected heat spikes ahead of 27 June, as well as real-time updates from Wunderground for the Incheon station[4]. A recent report from Chosun notes that May 2026 was the hottest May ever recorded, driven by elevated sea surface temperatures, which could signal lingering warmth into early summer[10]. However, the monsoon’s typical arrival in late June usually acts as a cooling catalyst, making extreme temperatures unlikely unless a rare pre-monsoon heat dome develops. The market’s traction and book depth are directly tied to funding flows from payment rails like Klarna and SEPA; as deposit fees and withdrawal friction decrease, more capital enters the book, sharpening price discovery around these weather dependencies.

Sources: 1 · 2 · 3 · 4 · 5

Methodology

This page is a comparison snapshot: one live quote (Polymarket), four reference venues with their key attributes, and a single execution path — every trade button routes to Polymarket Klarna UK, which mirrors the Polymarket order book directly.

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?

Polymarket Klarna 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 Klarna UK?

Zero. Polymarket Klarna 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 Klarna 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.