Highest temperature in Seoul (Incheon) on August 10?

Platform comparison

Market context

Seoul’s late-summer heat remains the key driver here, with the market leaning on whether the capital can sustain another very hot afternoon or whether cloud, wind shift, or marine influence keeps the Incheon airport reading down. Official and commercial forecasts have recently clustered around the low-to-mid 30s Celsius, with Polymarket’s own market page citing KMA guidance near 34°C and crowd pricing split mainly between 33°C and 34°C, which matches the idea that this is a narrow-banding temperature call rather than a binary heatwave bet[2].

Recent history argues for caution in reading a single hot spell as enough to force the very top end. South Korea has just set a new national heat record and Seoul itself has already logged extreme readings this month, including 40.2°C in one district and a 37.9°C citywide maximum earlier in August, while Reuters reported Seoul was forecast near 39°C during the current heatwave peak[10][11][7]. That backdrop supports elevated expectations, but the market’s resolution source is Incheon Intl Airport Station, not central Seoul, so coastal moderation and timing of the day’s peak matter more than headline city temperatures[2].

The main catalyst is the short-range forecast path into the afternoon, especially any update from the Korea Meteorological Administration and whether heat persists under mostly clear skies or is trimmed by thicker cloud and light precipitation risk. Reuters noted the heatwave was severe enough for the president to order an all-out response, underscoring how closely traders are now watching forecast revisions and real-time observations rather than fixed seasonal averages[10]. For this market, the crucial dependency is not a scheduled event but the sequence of hourly observations at Incheon, because the final bucket will be determined by the highest Daily Observations entry before the next day’s first datapoint appears[2].

Sources: 1 · 2 · 3 · 4 · 5

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 10? 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

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 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.