Highest temperature in Tokyo on August 17?

Platform comparison

Market context

On 17 August 2026, the highest temperature recorded at Tokyo Haneda Airport Station will determine this market's settlement. The resolution hinges on the Daily Observations table within Weather Underground's historical data, not the summary Day High & Low figures, which occasionally diverge due to measurement timing and station protocols. Tokyo's August climate typically peaks between 32–36 °C, though extreme heat events have pushed readings above 37 °C in recent years.

The 0% crowd probability reflects the market's current state rather than meteorological likelihood. Historical August temperatures at Haneda show considerable year-to-year variation; the Japan Meteorological Agency recorded 35.1 °C on 17 August 2023, whilst 2022 saw 32.8 °C on the same date. El Niño and La Niña cycles, Pacific high-pressure systems, and typhoon activity in early August all influence late-summer heat patterns across the Kanto region. Traders should monitor Japan Meteorological Agency seasonal forecasts released in July 2026 and any tropical cyclone activity that might suppress temperatures in mid-August.

From a regulatory standpoint, this market's accessibility depends on jurisdiction and stake size. Under Germany's GlüStV framework, prediction markets on weather events fall outside gambling licensing if structured as information contracts. US CFTC oversight applies to certain derivatives but typically exempts small-scale prediction markets under $1,500 per position. Platforms offering no-KYC access up to $1,500 allow retail participation without identity verification, though settlement and withdrawal may trigger higher compliance thresholds depending on operator licensing and user domicile.

Methodology

This overview of Highest temperature in Tokyo on August 17? 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.

What happens during a tax audit?

You're responsible for documenting your trades. Is Kalshi Legal in California 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).

What if regulation changes?

If regulation changes in your jurisdiction (e.g. prediction markets are banned), Is Kalshi Legal in California would geo-block the affected region and continue processing withdrawals. Your funds remain withdrawable at any time.