Highest temperature in Seoul (Incheon) on August 5?

Platform comparison

Market context

Seoul’s late-summer heat is the real-world driver here, with the key question being whether the day’s maximum at Incheon Airport reaches a band that has already been signposted by forecasters. Seoul is under a severe heat warning, and SBS reports a daytime high near 38°C for the capital, with intense heat lingering through the day and warm nights failing to provide relief.[1] That makes a zero-implied-probability outcome for the top temperature range look detached from the weather setup: the market is effectively waiting to see whether the airport station prints something closer to the upper-30s forecast than to a milder, monsoon-affected reading.[1][14]

For framing, August is usually one of the hottest periods in Seoul, with climatology showing average daytime temperatures around the high 20s and record August highs reaching about 38.2°C.[14] Forecast services are broadly consistent with a very warm day: AccuWeather puts Seoul’s August 5 high in the upper 80s Fahrenheit, while other outlets show mid-30s Celsius or higher, which is enough to keep the market anchored around the upper end of summer norms rather than an outlier cool day.[2][4][11] In that context, a surprise low reading would likely require more cloud, rain, or marine influence than current forecasts suggest.[1][4]

The main catalyst to watch is the official short-range forecast and the day’s realised station observations, because settlement is tied to the highest temperature recorded at Incheon Intl Airport Station rather than a citywide average.[7][10] Traders should also watch for any update on showers in western areas, since SBS notes intermittent rain and KMA short-range guidance can shift quickly when convective activity develops.[1][7] The market is therefore leaning most heavily on whether the warning-level heat holds through the afternoon window, with a small cooling bias only if local precipitation or sea-breeze effects cap the airport’s maximum below the broader Seoul forecast.[1][7]

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 5? 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.

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.

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.

Which political events have the biggest volume?

US Presidential election, party nominations (DNC/RNC), Senate majorities, individual state outcomes (Pennsylvania, Michigan, Wisconsin), and major European elections. Peak markets reach $50-500M per event.