Highest temperature in Seoul (Incheon) on August 15?

Platform comparison

Market context

Seoul's highest temperature on 15 August 2026 will be measured at Incheon International Airport Station and recorded in Weather Underground's Daily Observations table, with settlement determined by the granular observation data rather than summary high-low figures. The market currently shows 0% implied probability across major platforms, suggesting either extreme confidence in a specific temperature range or minimal liquidity. Across prediction book operators, Polymarket displays decimal odds (1.01 or tighter), whilst Kalshi and Betfair present fractional or traditional formats; the 0% reading indicates no traders are backing the YES position at any price, a pattern more common on less-liquid weather contracts where volume concentrates on a single range outcome.

Historical August temperatures at Incheon show consistent patterns: the airport station typically records highs between 28–32°C during mid-August, with occasional peaks above 33°C during heat waves. The 2018 Korean heat wave pushed readings to 34.5°C, whilst 2022 saw more moderate peaks around 30–31°C. These precedents frame how traders should interpret the current zero probability—it likely reflects consensus that the actual high will fall within a bounded range already priced into other buckets, rather than genuine uncertainty about whether measurement will occur.

Traders should monitor the Korea Meteorological Administration's seasonal forecasts released in July 2026, which typically signal whether an anomalous heat pattern is developing. Real-time tracking begins in early August; any sustained high-pressure system over the Korean peninsula in the fortnight before 15 August would shift probability mass toward higher temperature ranges. Settlement depends entirely on Wunderground's Daily Observations extraction, making data availability and station continuity the primary operational risks.

Methodology

This page compares Highest temperature in Seoul (Incheon) on August 15? specifically across Polymarket, Kalshi, Betfair Exchange and Smarkets. The live probability is the Polymarket mid; the comparison columns summarise each venue's fee structure, KYC, settlement currency and payment rails. Every CTA routes to Robinhood Prediction Markets, which mirrors the Polymarket order book at 0% fees.

Resolution & payout

Settlement is the biggest difference between the four platforms: Polymarket on-chain in USDC (instant), Kalshi USD via CFTC (T+1), Betfair and Smarkets in local currency via bank withdrawal (T+1 to T+3). On-chain settlement clears in minutes — the fastest payout path of the four.

FAQ

Is Betfair a Polymarket alternative?

Only partially. Betfair Exchange is UK-focused with a sports-betting emphasis; they have politics markets but with thinner liquidity than Polymarket. Settlement in GBP/EUR, 2-5% commission on winnings.

What about Smarkets as an alternative?

Smarkets is a UK betting exchange with a lower default commission (2%) than Betfair. Liquidity on political markets is below Polymarket, comparable to Kalshi. Geo-blocked in many jurisdictions.

Which platform is accessible globally?

Polymarket is geo-blocked in the US/UK/EU. Kalshi is US-only. Betfair and Smarkets are UK-restricted. Robinhood Prediction Markets has a different geo footprint and routes to Polymarket's order book at 0% fees.

Are all these platforms regulated?

No. Kalshi is CFTC-regulated (US). Betfair and Smarkets are UK Gambling Commission licensed. Polymarket operates without explicit regulation — a different risk profile than a regulated sportsbook.

Which platform supports Klarna/SOFORT?

Directly: none. Polymarket accepts only USDC on Polygon. Robinhood Prediction Markets offers a fiat on-ramp via Klarna or SOFORT (DE/AT/CH) and converts internally to USDC for the Polymarket order book. T+1 processing.