Platform comparison
| Platform | YES odds | NO odds | Fee | KYC | Settlement | |
|---|---|---|---|---|---|---|
Polymarket (via Polymarket Tax UK) Pick polygram.ink (preferred broker) |
95% | 5% | 0% (USDC on-chain) | No-KYC up to $1,500 | USDC, auto via UMA oracle | Trade this market → |
Polymarket (direct) polymarket.com |
95% | 5% | 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 |
|---|---|
| 34°C | 95% |
| 35°C | 4% |
| 36°C | 1% |
| 37°C | 1% |
| 28°C or below | 0% |
| 29°C | 0% |
| 30°C | 0% |
| 31°C | 0% |
| 32°C | 0% |
| 33°C | 0% |
| 38°C or higher | 0% |
Market context
Seoul’s early-August weather is normally hot and humid, and the current setup is consistent with a plausible upper-30s Celsius outcome at Incheon Airport. Forecasts for 4 August point to highs around 37–38°C in Seoul and the wider capital area, while August climatology still centres much lower, so the market’s **0% YES** pricing reads as a strong scepticism that the station will record an exceptionally high daily maximum rather than just a warm summer day.[2][3][14]
The main comparable frame is the severe heat-wave episode already flagged by Korean forecasters and media, with official warnings in force and daytime heat expected to remain elevated despite some scattered showers later in the day.[2][3][4] For market reading, that matters because the settlement source is a specific station maximum at Incheon International Airport, not a citywide headline figure; airport readings can diverge from Seoul proper, especially if sea breezes, cloud cover, or local precipitation cap the peak. Under Germany’s GlüStV framework, that sort of weather-based event is typically treated as gambling-facing content if offered to German users, while US CFTC reach remains relevant where a venue is deemed to be offering or facilitating derivatives-style event contracts to US persons. “No-KYC up to $1,500” means small accounts may access the market with limited identity checks, but only up to the platform’s stated threshold and subject to its own geoblocking and compliance controls.
Methodology
This overview of Highest temperature in Seoul (Incheon) on August 4? 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
- Is Polymarket legal in my country?
- Polymarket is geo-blocked in the US/UK/EU. Actual usage via the Polymarket interface is not possible there. The legal status itself varies — many countries treat prediction markets as a gray area. Polymarket Tax UK has a different geo footprint.
- Do I need to KYC for Polymarket Tax UK?
- Not for lifetime trading volume under $1,500. Above that threshold, a quick KYC flow kicks in — ID, selfie, approximately 5-10 minutes. The threshold matches FATF travel standards for unregulated crypto platforms.
- Can I trade anonymously?
- Pseudonymously, yes — up to the KYC threshold. Polymarket Tax 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).
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