Highest temperature in Seoul (Incheon) on August 4?

Platform comparison

Market context

The real-world event is the **highest temperature recorded at Incheon International Airport on 4 August 2026**, with the market settling to the temperature band that contains that daily maximum. Current weather context points to a hot start to the day across the Seoul metro area, with Seoul forecast to reach about 38°C and Incheon about 37°C, while morning and afternoon showers are expected in parts of the wider region without enough rain to materially ease the heat.[2][3]

The current **0% YES** crowd-implied probability sits well below the published weather backdrop, which is more consistent with an elevated maximum than with a cool outcome. August climatology for Seoul commonly features daytime highs in the mid-20s to high-20s Celsius, but the first week can be notably hotter, and one market-relevant comparable is the historic August peak around 38.2°C, showing that extreme readings are plausible even if not typical.[1][14][16]

From a trading-access perspective, this is a weather contract with cross-border regulatory and onboarding frictions rather than a pure event question. German **GlüStV** rules can matter because prediction markets may be treated as gambling-style products for access and advertising purposes, while the **US CFTC** can assert reach where a platform or user activity falls within its jurisdiction; separately, “**no-KYC up to $1,500**” usually means a user may be able to trade or withdraw within that cumulative limit without identity verification, but larger activity typically triggers KYC checks and can affect whether a German or US-based user can actually use the market in practice.

Sources: 1 · 2 · 3 · 4 · 5

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

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. Is Polymarket Legal in Canada 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. Is Polymarket Legal in Canada 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).