Highest temperature in Seoul on July 31?

Platform comparison

Market context

Seoul’s late-July heat profile is normally warm but not extreme, with July highs around 29°C and a history of occasional spikes into the high 30s, including 38.3°C on 31 July 2018 and a July record of 37.8°C at the official Seoul station in 2024[1][10][15]. For this market, the relevant settlement point is the highest temperature at Incheon Intl Airport Station on 31 July 2026, so the crowd’s 0% YES implies a view that an extreme reading is very unlikely, not that the day cannot be hot in Seoul itself[4][11]. The distinction matters because airport-specific coastal conditions can diverge from central Seoul by a degree or more, especially under sea-breeze influence.

Comparable late-July heatwaves show how quickly readings can jump if stagnant air persists. Seoul has logged long runs of tropical nights and repeated 35°C-plus forecasts, while the wider capital region has also seen readings near or above 40°C in severe episodes, including 2026 records in the south and 2024/2025 summer spikes in the capital area[2][8][9][10][13]. Under Germany’s GlüStV, access can be practically constrained if the platform classifies the market as gambling-facing, which typically affects onboarding, advertising, and payment flows for German users; the US CFTC’s reach is broader where a venue offers event contracts to US persons or into US markets, even if the underlying event is foreign. In practical terms, “no-KYC up to $1,500” means a trader may be able to open and trade with light identity checks below that cumulative threshold, but higher activity can trigger verification and limit how frictionless this market is to access.

The key catalysts are the KMA’s hourly updates, any sudden frontal rain band or monsoon remnant, and the airport’s own local conditions around midday and early afternoon, when daily highs are usually set[4][11]. The market settles on Wunderground’s daily history page for Incheon Intl Airport Station, so traders should watch for any change in the day’s maximum before the settlement window closes, especially if cloud cover, rain, or a sea breeze keeps the airport below the central Seoul temperature.

Sources: 1 · 2 · 3 · 4 · 5

Methodology

This overview of Highest temperature in Seoul on July 31? 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.

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.

What happens during a tax audit?

You're responsible for documenting your trades. Polymarket Tax UK exports a full transaction history (CSV/PDF) for tax reporting. In an audit you'll need to present these documents.

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).