Highest temperature in Seoul on July 17?

Platform comparison

Market context

Seoul is entering its peak summer heatwave period, with the Incheon International Airport station expected to record temperatures near 30°C on 17 July 2026. The current 0% crowd-implied probability for a “YES” outcome suggests the market believes the temperature will fall outside the specific range offered, likely because the forecast aligns closely with historical norms rather than extreme outliers.

Historical data for Seoul in July shows daytime maximums typically reaching 28°C to 30°C, with 2026 tracking nearly identical to the long-term average at 29.4°C so far [1][2]. Comparable cases from recent years indicate that temperatures exceeding 33°C are rare and usually tied to exceptional heat domes, which have not been forecast for this period. This consistency with the mean explains the market’s strong lean against extreme highs.

Traders should monitor daily Wunderground updates for the Incheon station as the settlement window closes at 12:00 UTC, watching for any sudden shifts in humidity or cloud cover that could suppress peak temperatures [1]. No scheduled political debates or campaign-finance disclosures are relevant to this weather event, but meteorological bulletins from the Korea Meteorological Administration may provide early signals if a heatwave intensifies unexpectedly. The market is leaning on the absence of anomalous atmospheric conditions rather than any political catalyst.

Sources: 1 · 2

Methodology

This page tracks Highest temperature in Seoul on July 17? 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

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

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.

What resolution source is used for elections?

Polymarket defines the source per contract — usually Associated Press (AP Race Call), Reuters or the official electoral commission. The source is stated in contract details before the market opens.

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.