Highest temperature in Seoul on June 26?

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Market context

The underlying real-world event is straightforward: on 26 June 2026, the highest temperature recorded at Incheon International Airport will be measured in degrees Celsius, and the market resolves to the range containing that value. Today, Polymarket prices the YES contract at 0%, implying the crowd believes the temperature will not fall into the specific range offered, likely because historical averages suggest a high near 26°C to 28°C, which may sit outside the narrow bracket defined for this trade[1][2].

Historically, June in Seoul marks the start of early summer with manageable heat, where daytime maximums typically reach 26°C, falling to 17°C overnight, and rarely exceed the intense tropical levels seen in July or August[1][2]. The average warmest day in June is 28.06°C, with a high of 26.7°C, meaning traders should view the current 0% probability as a reflection of the range being set too low or too high relative to these long-term norms rather than an expectation of extreme cold[8].

Traders must watch the onset of Korea’s monsoon season, which usually begins in late June, bringing increasing humidity and short, predictable afternoon showers that could suppress peak temperatures below the expected 28°C threshold[2]. While no specific weather announcement has been released for this exact date, the dependency on the monsoon timing is critical; if the rains arrive earlier than usual, the high could drop to 22°C–24°C, potentially invalidating the current market range and shifting the conditional token value on the Polygon network[2][6]. Settlement relies on Wunderground data for Incheon, so any discrepancy between Seoul and Incheon readings due to coastal cooling effects could also alter the final resolution[2].

Sources: 1 · 2 · 3 · 4 · 5

Methodology

This page reviews Highest temperature in Seoul on June 26? 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

Is this market available outside the US?

Polymarket Legit? 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 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.

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.