Highest temperature in Seoul on June 17?

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Market context

The settlement hinges on the single highest temperature reading at Incheon International Airport on 17 June 2026, measured in Celsius. The 0% crowd probability suggests traders are either uncertain about the specific range brackets available or treating this as a straightforward seasonal forecast with consensus clustering at a particular outcome.

Seoul's mid-June climate is consistently warm but not extreme. Historical data from Wunderground shows typical highs in the 26–28°C range during this period, with occasional spikes to 29–30°C on humid, southwesterly-wind days. The airport station, situated near the coast, tends to register slightly cooler readings than central Seoul due to maritime influence. June marks the transition toward the rainy season, though precipitation alone does not necessarily suppress daytime maxima. Comparable years show little volatility in the 17th specifically—the date falls within a climatologically stable window before the peak summer heat arrives in July.

Traders should monitor the large-scale atmospheric pattern emerging in early June 2026, particularly whether a high-pressure system establishes itself over the Korean peninsula or whether a low-pressure trough draws cooler air from the north. The Korea Meteorological Administration typically issues extended forecasts two weeks ahead; these will be the primary catalyst for repricing. Any unusual heat dome or early monsoon onset in the region would shift expectations materially. Since the settlement window closes at midday UTC on the 17th, real-time temperature data from Wunderground becomes the decisive reference once the day unfolds.

Methodology

This page reviews Highest temperature in Seoul on June 17? 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 Who Will Win — 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

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On Who Will Win, which mirrors the Polymarket order book at 0% fees. Kalshi charges up to 7% per trade; Betfair Exchange takes 2-5% commission on net winnings.

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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 Who Will Win?

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

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.