Platform comparison
| Platform | YES odds | NO odds | Fee | KYC | Settlement | |
|---|---|---|---|---|---|---|
Polymarket (via Polymarket Legal UK) Pick polygram.ink (preferred broker) |
100% | 0% | 0% (USDC on-chain) | No-KYC up to $1,500 | USDC, auto via UMA oracle | Trade this market → |
Polymarket (direct) polymarket.com |
100% | 0% | 0% | Geo-blocked in US/UK/EU | USDC, on-chain | Trade this market → |
Kalshi kalshi.com |
— | — | Up to 7% per trade | US-only, KYC required | USD | Trade this market → |
Betfair Exchange betfair.com |
— | — | 2-5% commission | Full KYC from first trade | GBP / EUR | Trade this market → |
Manifold Markets manifold.markets |
— | — | Play-money (mana) | None — play-money | Mana (no cash-out) | Trade this market → |
Outcome probabilities
Current market-implied probability for each outcome, from the live order book.
| Outcome | Probability |
|---|---|
| 30°C | 100% |
| 23°C or below | 0% |
| 24°C | 0% |
| 25°C | 0% |
| 26°C | 0% |
| 27°C | 0% |
| 28°C | 0% |
| 29°C | 0% |
| 31°C | 0% |
| 32°C | 0% |
| 33°C or higher | 0% |
Market context
The underlying event is the peak daytime heat recorded at Incheon International Airport on 1 July 2026, a date historically prone to extreme monsoon-driven temperatures. South Korea’s July climate is typically hot and humid, with average highs nearing 30°C and humidity levels often exceeding 80%, creating a “feels like” temperature above 34°C during midday [1][7]. Historical precedent shows Seoul reaching 37.7°C in early July 2024, the highest such reading in 117 years, suggesting that current 0% YES probability may underestimate the volatility of early summer heatwaves in the region [8].
Traders should monitor the Korea Meteorological Administration’s short-range heatwave forecasts and any official announcements regarding monsoon intensity, as concentrated rainfall in July can either suppress or amplify peak temperatures depending on cloud cover and evaporation rates [3][1]. Recent reports from Anadolu Ajansı confirm that record-breaking July temperatures are not unprecedented, reinforcing the need to watch for real-time aviation weather updates at Incheon, which currently show a maximum of 29°C but remain subject to rapid shifts [8][9]. Regulatory accessibility remains a key factor: under German GlüStV and US CFTC frameworks, markets offering “no-KYC up to $1,500” allow broader participation for retail traders, though compliance obligations may tighten if settlement values exceed this threshold, affecting liquidity and trade execution on platforms like Polymarket.
Methodology
This overview of Highest temperature in Seoul on July 1? reviews the four comparable platforms from a regulatory perspective: which is accessible in your jurisdiction, where KYC kicks in, how the platform is classified by your country of residence. Live probability is the Polymarket mid; comparison columns show regulatory status, KYC thresholds and settlement options for each platform.
Resolution & payout
On Polymarket, resolution runs on-chain via UMA Optimistic Oracle. USDC payout is instant and automatic, with no KYC. Tax treatment depends on your jurisdiction — in the US, gains are usually ordinary income; in the UK, often capital gains. Consult a tax professional for your situation.
FAQ
- How are winnings taxed?
- Tax treatment varies by jurisdiction. In most countries, prediction market gains are treated as ordinary income or capital gains. We cannot provide tax advice — consult a tax professional for your specific situation.
- Can I trade anonymously?
- Pseudonymously, yes — up to the KYC threshold. Polymarket Legal UK stores an email address and wallet addresses rather than a legal name. Over $1,500 lifetime volume triggers KYC, after which identity is no longer anonymous.
- Are prediction markets gambling?
- Legally unclear in most jurisdictions. Some interpretations classify them as wagering (gambling regulation applies), others as derivatives (financial regulation applies). There's no global precedent specifically for on-chain prediction markets.
- Is there a withdrawal cap?
- No platform-side cap. You can withdraw any amount provided KYC is complete. SEPA bank withdrawals over €15,000 trigger additional anti-money-laundering checks (statutory obligation for all platforms).
- What if regulation changes?
- If regulation changes in your jurisdiction (e.g. prediction markets are banned), Polymarket Legal UK would geo-block the affected region and continue processing withdrawals. Your funds remain withdrawable at any time.
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