Highest temperature in Seoul on July 8?

Platform comparison

Market context

The underlying event is the highest temperature recorded at Incheon International Airport on 8 July 2026, a date that historically marks the peak of Seoul’s early-summer heatwave. Current crowd-implied probability of 0% for the “YES” outcome suggests traders believe the temperature will not exceed the market’s threshold, likely due to expectations of monsoon-driven cooling.

Historical data frames this probability sharply: on 8 July of a prior year, Seoul reached 37.8°C—the highest early-July temperature ever recorded since records began in 1908[1]. July is also Korea’s wettest month, with daily average highs near 30°C but humidity pushing felt temperatures over 34°C[4]. The 2025 July saw 22 tropical nights, the highest since 1908, indicating a trend of intensifying heatwaves[5]. Yet, the 2026 forecast for Seoul shows daily highs between 80°F and 94°F (27°C–34°C), with overnight lows of 72°F–79°F[2], suggesting a more moderate year than 2025.

Traders should monitor the Korea Meteorological Administration’s short-range forecasts for rain intensity and precipitation probability, which currently sit at 60% with slight rainfall[6]. The market leans on the monsoon’s timing: if heavy rains arrive before 8 July, temperatures may drop below the threshold. Recent campaign-finance disclosures or political declarations on climate policy could also influence public sentiment, though no scheduled debates are imminent. As of now, the National Weather Service reports slight rain with 60% precipitation probability, a key dependency for the outcome[6].

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 on July 8? 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.

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.

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.