Highest temperature in Seoul on June 12?

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Market context

Seoul's weather on 12 June 2026 will be measured at Incheon International Airport Station, with the settlement hinging on the single highest temperature recorded across the entire calendar day in degrees Celsius. The market currently shows zero probability assigned to any outcome, suggesting either minimal trading activity or a technical issue with the odds display.

Historical data from Incheon reveals that early-to-mid June typically sits within Seoul's transition into summer proper. Average highs for this period range between 24–27°C, though the airport station—positioned near coastal influences—occasionally records slightly cooler readings than central Seoul. The 0% crowd probability appears disconnected from meteorological norms; comparable weather markets on other platforms generally assign meaningful probability mass across multiple temperature bands for this season and location, with the 25–28°C range typically receiving the highest concentration of trader conviction.

The primary catalyst affecting June 2026 temperatures will be the strength and positioning of the Pacific high-pressure system and any early monsoon activity. Current seasonal forecasting models, updated monthly by the Korea Meteorological Administration, will provide the most reliable guidance as the settlement date approaches. Traders should monitor whether any unusual atmospheric patterns—such as early heat waves or anomalous low-pressure systems—emerge in May and early June, as these could shift expectations materially away from climatological averages. Wunderground's historical data feed will be the sole arbiter of settlement, making the accuracy of their Incheon station readings the critical dependency.

Methodology

Methodologically we separate two layers: the live probability (Polymarket mid-price) and the platform attributes (fee, KYC, settlement currency, payment rails). The odds column is filled only where we have clean data — that avoids the made-up numbers that get a network demoted when search engines cross-check against the source venue.

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

Where can I trade this market with the lowest fees?

On Best Prediction Markets, 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.

What does it cost to trade on Best Prediction Markets?

Zero. Best Prediction Markets 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, Best Prediction Markets 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.