Platform comparison
| Platform | YES odds | NO odds | Fee | KYC | Settlement | |
|---|---|---|---|---|---|---|
Polymarket (via Polymarket Legal UK) Pick polygram.ink (preferred broker) |
57% | 43% | 0% (USDC on-chain) | No-KYC up to $1,500 | USDC, auto via UMA oracle | Trade this market → |
Polymarket (direct) polymarket.com |
57% | 43% | 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 |
|---|---|
| 32°C | 57% |
| 33°C | 41% |
| 34°C | 3% |
| 35°C | 1% |
| 26°C or below | 0% |
| 27°C | 0% |
| 28°C | 0% |
| 29°C | 0% |
| 30°C | 0% |
| 31°C | 0% |
| 36°C or higher | 0% |
Market context
The event is whether the **highest temperature** at **Incheon Intl Airport Station** on 3 August 2026 falls into the listed Celsius band used by the market. Seoul’s wider August climate gives the baseline: average highs are around **30–31°C**, with muggy, showery conditions common, so the market is essentially a question about where the day’s peak lands relative to the usual late-summer range[1][12][14].
That context makes the current **0% YES** crowd price easy to read as a market starting point rather than a weather signal. Comparable Seoul history shows August can still produce much hotter extremes, with the city’s record high at **39.6°C** and heatwave episodes reaching the high 30s, but the more typical outcome is a peak near **30°C** rather than an outlier surge[2][14]. Because the settlement source is the Wunderground daily history page for Incheon, the relevant comparison is the airport station’s actual daytime maximum, not the broader Seoul metro forecast[7].
Traders should watch the short-range forecast for the airport, any heat advisories, and whether monsoon rain or cloud cover suppresses the afternoon maximum. That matters more than generic monthly averages, because a single heavy shower can cap the day’s high well below climatology[1][12]. From a market-access perspective, German **GlüStV** rules can make some operators or user flows problematic for Germany-facing users, the **US CFTC** has reach where derivatives-style products or US persons are implicated, and “**no-KYC up to $1,500**” generally means small balances or trading volume may be available with lighter identity checks, but not full unrestricted access.
Methodology
This overview of Highest temperature in Seoul (Incheon) on August 3? 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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