Highest temperature in Seoul on June 15?

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Market context

On 15 June 2026, the highest temperature recorded at Incheon International Airport Station will determine which range this market resolves to, with settlement based on historical weather data from Weather Underground. Seoul's mid-June climate typically sees daytime highs between 26–28°C, though heat waves can push temperatures several degrees higher. The 0% crowd probability suggests traders are either awaiting range options or treating this as a straightforward seasonal forecast with limited uncertainty.

Historical June temperature records for the Seoul metropolitan area show considerable year-to-year variation. Between 2015 and 2024, mid-June highs at Incheon ranged from 23°C during cooler years to 31°C during heat waves, with an average clustering around 26–27°C. The 2018 heat wave pushed temperatures to 29–30°C in mid-June, whilst cooler patterns in 2017 and 2020 kept highs below 25°C. This spread indicates that whilst a "normal" outcome near 26–27°C is statistically most likely, outlier scenarios—either unseasonably cool or heat-wave conditions—occur frequently enough to merit consideration.

Traders should monitor East Asian weather patterns from late May onwards, particularly the strength and positioning of the Pacific high-pressure system and any tropical cyclone activity in the region. The Korean Meteorological Administration typically issues seasonal forecasts in early June that can shift market expectations. El Niño or La Niña conditions heading into June 2026 may influence whether the jet stream favours cooler maritime air masses or warmer continental patterns across the Korean peninsula.

Methodology

This page tracks Highest temperature in Seoul on June 15? across four political prediction venues. Live odds come from the Polymarket order book (the deepest political prediction-market book). Kalshi is the CFTC-regulated US alternative, Betfair the established UK sports-exchange with politics markets, Manifold the open play-money variant. Trump Prediction routes every trade through to Polymarket — at 0% fees.

Resolution & payout

For political markets the resolution source is decisive. Polymarket defines a concrete source per contract (e.g. AP, Reuters, official electoral commission) and uses the UMA Optimistic Oracle as the on-chain dispute mechanism. With a clearly defined outcome the USDC payout lands within minutes of the final confirmation.

FAQ

Where can I trade this market with the lowest fees?

On Trump Prediction, 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.

Is this market available outside the US?

Trump Prediction 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.

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.