Highest temperature in Seoul on July 20?

Platform comparison

Market context

Seoul faces a critical heat assessment as the Incheon International Airport station records its peak temperature for 20 July 2026, with the market currently pricing a specific high-temperature outcome at zero probability. This binary resolution hinges on whether the day’s maximum Celsius reading falls within a defined range, a threshold that appears increasingly unlikely given the region’s volatile summer climate patterns.

Historical data frames this near-certain “No” probability against a backdrop of escalating heatwaves, where early July 2025 already shattered records with a peak of 37.1°C, the highest since 1908[3]. While typical July highs average 28°C, the nation recently experienced its second-hottest July on record, with a nationwide average of 27.1°C in 2025, suggesting that extreme outliers are becoming the norm rather than the exception[6]. The humid continental climate, characterized by 80% relative humidity and frequent precipitation, often amplifies thermal stress, yet the current market sentiment implies the specific range in question is virtually impossible to hit under current atmospheric conditions[5].

Traders should monitor real-time updates from the Korea Meteorological Administration and Wunderground history logs, which serve as the definitive settlement source for the Incheon station data[1]. Although no scheduled political debates or campaign disclosures directly influence meteorological outcomes, the broader context of climate policy announcements and recent environmental disclosures may indirectly signal shifting long-term temperature baselines. The market leans heavily on the immediate weather catalyst: the actual temperature reading at 2 p.m. or later on the settlement day, with no secondary political events expected to alter the physical resolution before the 2026-07-20T12:00:00Z deadline.

Sources: 1 · 2 · 3 · 4 · 5

Methodology

This page tracks Highest temperature in Seoul on July 20? 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. For users geo-blocked from Polymarket directly, brokers like Election Predictions UK provide a 0%-fee route into the same order book.

Resolution & payout

Political markets typically settle on official candidate or agency confirmation. Polymarket uses UMA Optimistic Oracle: a proposer posts the outcome with a bond, the two-hour window opens, then the smart contract pays USDC.

Kalshi settles USD via CFTC clearinghouse, with clearly defined resolution sources (e.g. AP race calls for elections). Betfair settles after the official outcome is registered with the league or agency. Manifold is play-money.

FAQ

How accurate are political prediction markets?

Historically more accurate than polls. Polymarket's Brier score on US 2024 elections was ~0.11 — better than 538 (~0.14) and every mainstream poll. Markets aggregate information with real skin in the game.

Can prediction markets influence election outcomes?

Markets reflect expectations rather than create them. Studies show public-facing markets can anchor expectations, but don't influence the underlying outcome. Political markets are information, not advocacy.

Which platform has the deepest political liquidity?

Polymarket — by far. US 2024 presidential volume was ~$3.5B vs Kalshi (~$200M) and Betfair (~$120M). Where Polymarket is geo-blocked, brokers like Election Predictions UK route into the same order book at 0% fees.

Are political prediction markets legal in my country?

It varies. They sit in legal gray areas in most jurisdictions. Polymarket is geo-blocked from US/UK/EU; some broker frontends have a different geo footprint. Trade only with capital you can afford to lose, and only if you understand the legal status in your jurisdiction.

Why do Polymarket and Kalshi differ on elections?

Kalshi must follow CFTC compliance — strict definitions, clear resolution sources, US citizens only with KYC. Polymarket operates globally without CFTC oversight — deeper liquidity, but also higher regulatory risk.