Platform comparison
| Platform | YES odds | NO odds | Fee | KYC | Settlement | |
|---|---|---|---|---|---|---|
Polymarket (via Trump Prediction) Pick polygram.ink (preferred broker) |
57% | 43% | 0% (USDC on-chain) | No-KYC up to $1,500 | USDC, auto via UMA oracle | Live odds → |
Polymarket (direct) polymarket.com |
57% | 43% | 0% | Geo-blocked in US/UK/EU | USDC, on-chain | Live odds → |
Kalshi kalshi.com |
— | — | Up to 7% per trade | US-only, KYC required | USD | Live odds → |
Betfair Exchange betfair.com |
— | — | 2-5% commission | Full KYC from first trade | GBP / EUR | Live odds → |
Manifold Markets manifold.markets |
— | — | Play-money (mana) | None — play-money | Mana (no cash-out) | Live odds → |
Outcome probabilities
Current market-implied probability for each outcome, from the live order book.
| Outcome | Probability |
|---|---|
| 26°C | 57% |
| 25°C | 22% |
| 27°C | 17% |
| 28°C | 5% |
| 21°C or below | 0% |
| 22°C | 0% |
| 23°C | 0% |
| 24°C | 0% |
| 29°C | 0% |
| 30°C | 0% |
| 31°C or higher | 0% |
Market context
The market seeks to identify the highest temperature recorded at Incheon International Airport on 18 July 2026. Seoul's summer climate is characterised by monsoon influence and high humidity; July typically sees daily highs between 28–32°C, though heat waves can push readings above 35°C. The 0% crowd probability suggests traders are either uncertain about range thresholds or awaiting clarity on settlement mechanics.
Historical July data from Incheon shows considerable year-to-year variation. In 2023, the highest July temperature reached 34.2°C; in 2022, it peaked at 33.8°C. The 2018 heat wave saw July maxima exceed 35°C on multiple days. This variability reflects the unpredictability of monsoon timing and intensity, which determines whether cooler, wetter conditions or high-pressure heat dominates mid-July. Comparable East Asian airports show similar seasonal patterns, with outlier heat events occurring roughly once per decade.
Traders should monitor Korean Meteorological Administration forecasts as July 2026 approaches, particularly advisories issued in late June regarding monsoon positioning and high-pressure systems. El Niño or La Niña conditions in early 2026 may influence Pacific weather patterns affecting Korea's summer climate. Wunderground's historical data feed will be the definitive source; traders should verify the station's measurement consistency and any potential instrument changes before settlement.
Methodology
This page tracks Highest temperature in Seoul on July 18? 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
For political markets the resolution source is decisive. Polymarket defines a concrete source per contract (e.g. AP, Reuters, official electoral commission) and uses the UMA Optimistic Oracle as the on-chain dispute mechanism. With a clearly defined outcome the USDC payout lands within minutes of the final confirmation.
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.
- 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 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.
- 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.
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