Highest temperature in Seoul on June 29?

Platform comparison

Market context

Seoul is experiencing its hottest June ever, with heat wave days quadrupling the historical average as the monsoon season approaches late in the month. This extreme warmth frames the current 15% YES probability for a high temperature threshold, suggesting the market leans heavily on the unprecedented heat wave activity rather than typical seasonal variability. Historical data shows June highs usually range between 19°C and 28°C, yet the country recorded an average of 2.4 heat wave days from 1 June to 20 June alone, four times the norm from 1991 to 2020[8]. The highest maximum temperature recorded so far this month was 34.0°C on 19 June, indicating that extreme peaks are already possible before the settlement date[9].

Traders should monitor the timing of the monsoon onset and any sudden declarations regarding heat emergency protocols, as these catalysts could abruptly shift temperature trajectories. The weather agency in South Korea has flagged this June as the hottest ever, a development that could intensify if the monsoon delays further into July[8]. Recent news from The Straits Times confirms the severity of the heat wave, noting that the country is having its hottest June ever now, which serves as the primary market leaning catalyst[8]. With the settlement window ending on 29 June at 12:00 UTC, the key dependency is whether the monsoon rains arrive before the deadline to cool the Incheon Intl Airport Station, or if the heat persists to push temperatures into the higher range.

Sources: 1 · 2 · 3 · 4 · 5

Methodology

This page tracks Highest temperature in Seoul on June 29? 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 Trump Prediction 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.

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.

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.

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.