Highest temperature in Seoul (Incheon) on August 17?

Platform comparison

Market context

This market resolves based on the highest temperature recorded at Incheon International Airport on 17 August 2026, using Weather Underground's Daily Observations table as the authoritative source. Seoul's August temperatures typically peak in the 29–33°C range, though heat waves can push readings several degrees higher. The 0% implied probability suggests traders are pricing in an expectation that the temperature will fall below the lowest threshold offered, which warrants scrutiny given Seoul's consistent summer heat patterns.

Historical August data from Incheon shows that extreme heat events occur regularly but are not guaranteed. The station has recorded temperatures exceeding 35°C during August in recent decades, particularly during East Asian heat waves driven by the Pacific High and Tibetan High pressure systems converging over the Korean Peninsula. August 2023 saw Seoul experience temperatures above 33°C on multiple days. The specific resolution mechanism—relying on Daily Observations rather than summary highs—introduces a technical dependency that could affect settlement if discrepancies arise between Weather Underground's data tables.

Traders should monitor meteorological forecasts released in early August 2026, particularly from the Korea Meteorological Administration and international weather models tracking pressure patterns over East Asia. The timing of any heat wave systems in mid-August will be critical; these typically develop 7–10 days before peak intensity. Any anomalous atmospheric circulation patterns or tropical cyclone activity affecting the Korean Peninsula could suppress temperatures below historical norms, though such scenarios remain less common than typical summer heat.

Methodology

Political prediction markets differ structurally from sports betting: thinner liquidity, longer settlement windows, higher sensitivity to single news events. This page shows the live Polymarket quote for Highest temperature in Seoul (Incheon) on August 17? plus platform attributes for the three reference venues, so you can see at a glance where the deepest market for this question sits.

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.

UK Frequently Asked Questions

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 Trump Prediction route into the same order book at 0% fees.

How fast do political markets react to news?

High-liquidity markets move within seconds to minutes. A Trump tweet on the economy can shift the "Trump 2024" market 2-5 points before mainstream media has written anything.

Are UK election prediction markets available from the UK?

Yes. Betfair Exchange and Smarkets offer UKGC-regulated UK election markets (seat counts, party share, constituency results). Polymarket also lists UK election contracts with deeper global liquidity. Betfair winnings are typically tax-free for UK individuals; Polymarket profits are subject to HMRC CGT.