Highest temperature in Tokyo on August 5?

Platform comparison

Market context

Tokyo’s heat for 5 August will be measured by the **highest daily temperature at Haneda Airport station**, with the market settling from the Wunderground history page rather than from a citywide average. With the current crowd view at **0% YES**, the market is pricing in an outcome that would be far colder than Tokyo’s typical August pattern, which usually sees daytime highs around **30–31°C** and can run higher during strong summer heat.[5][10][15]

The historical frame matters because Tokyo’s summer distribution is normally centred well above the lower ranges now implied by the market, and official JMA data for early August 2026 already shows Haneda reaching **35.6°C on 1 August** and **33.0°C on 2 August** before any late-week cooling signal can be confirmed.[2] Recent Japan-wide heat coverage also shows how quickly temperatures can spike in early August, with Reuters reporting record-breaking heat in 2025 and the broader regional backdrop still dominated by hot-season extremes.[14] That makes the present 0% probability a statement about the market’s current pricing, not a forecast guarantee.

For accessibility and compliance, the main friction points are regulatory rather than meteorological. Under Germany’s **GlüStV** framework, prediction-market access can be restricted if a platform is treated as gambling rather than a financial instrument, while US **CFTC** oversight can apply where contracts fall within its jurisdiction, especially for US-facing participation. On the platform side, **no-KYC up to $1,500** means a trader can typically participate without full identity verification until cumulative activity crosses that threshold, which lowers entry friction for this specific market but does not remove jurisdictional or tax reporting issues.

Sources: 1 · 2 · 3 · 4 · 5

Methodology

This overview of Highest temperature in Tokyo on August 5? 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 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).