Highest temperature in Seoul on July 15?

Platform comparison

Market context

Seoul faces its peak summer heat on 15 July 2026, with the market tracking the highest temperature recorded at Incheon International Airport. The current 0% YES probability suggests the crowd expects the temperature to fall outside the specific range offered, likely due to an unusually cool forecast or a mismatched bracket. Programmatic traders would scrape Wunderground’s historical daily data for RKSI to back-test the range against the last decade’s mid-July peaks, automating entry only when the model’s confidence exceeds the implied odds.

Historically, Seoul’s mid-July highs at Incheon typically range between 28°C and 34°C, with 2023 and 2024 both exceeding 32°C during similar heatwaves. The 0% probability is anomalous unless the current range is set below 25°C or above 36°C, both extreme outliers for this station. Traders should compare the live forecast from the Korea Meteorological Administration against these baselines; if the forecast sits near 30°C, the zero probability may represent a mispricing exploitable by conditional orders triggered on forecast updates.

Key catalysts include the 24-hour forecast revision from the KMA, scheduled daily at 03:00 UTC, and any sudden shifts in the East Asian monsoon pattern. A recent report from Yonhap News noted that 2026’s summer is projected to be hotter than average due to a persistent high-pressure system over the Korean Peninsula, which could push temperatures toward 33°C or higher [1]. Automated bots should monitor these updates and adjust positions if the forecast breaches the market’s implied threshold, treating the 0% as a signal to verify the range’s validity rather than a definitive no-trade.

Methodology

We track Highest temperature in Seoul on July 15? across the five venues with material prediction-market liquidity. The probability shown is the live Polymarket mid; the comparison rows summarise how each venue treats the underlying contract — fees, KYC thresholds, settlement currency, deposit options. The highlighted row marks the cheapest route into Polymarket's order book.

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

Where can I trade this market with the lowest fees?

Polymarket is geo-blocked in the US/UK/EU. The easiest 0%-fee broker into the same order book is Kalshi Fees. Kalshi charges up to 7% per trade; Betfair Exchange takes 2-5% commission on net winnings.

Is this market available outside the US?

Polymarket itself is geo-blocked in the US/UK/EU. Always check the legal status of prediction markets in your jurisdiction before trading.

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.

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.

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.