Highest temperature in Tokyo on August 13?

Platform comparison

Market context

On 13 August 2026, the highest temperature recorded at Tokyo Haneda Airport Station will determine the resolution of this market. The settlement uses the Daily Observations table from Weather Underground rather than summary figures, a distinction that matters when intraday peaks diverge from official daily highs. Tokyo's August climate typically peaks between 32–36 °C, though heat waves can push readings above 37 °C. The 0% crowd probability suggests traders currently expect no extreme heat event on that specific date, though August remains Japan's hottest month and unpredictable weather patterns have shifted baseline expectations in recent years.

Historical August temperatures at Haneda show a median high near 33 °C with roughly one day per decade exceeding 38 °C. The 2023 summer saw multiple days above 35 °C across the Kanto region, establishing recent precedent for sustained heat. Comparable markets on Japanese summer temperatures have typically resolved within the 33–36 °C bands, with extreme outliers (above 37 °C) occurring in fewer than 15% of August days over the past decade. The current zero probability may reflect either late-summer cooling patterns or trader focus on earlier July peaks.

From a regulatory standpoint, this market operates under German GlüStV rules if accessed from the EU, with CFTC oversight applying to US-based participants. The £1,500 no-KYC threshold permits casual traders to participate without full identity verification up to that stake level, lowering barriers for weather-prediction engagement. Traders should monitor Japan Meteorological Agency forecasts released in early August and any tropical system developments in the Western Pacific, as typhoon activity or unusual pressure systems can materially shift temperature ranges within days of settlement.

Methodology

This overview of Highest temperature in Tokyo on August 13? 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.

UK Frequently Asked Questions

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.

Is Polymarket regulated by the UKGC?

No. Polymarket is not licensed by the UK Gambling Commission (UKGC). It is a decentralised prediction market operated under US regulation. UK traders can use it but do not benefit from UKGC dispute resolution or player protection requirements.

What are the HMRC tax rules on Polymarket profits for UK traders?

Polymarket profits are treated as cryptocurrency disposal events by HMRC. Each USDC settlement is a taxable event subject to Capital Gains Tax (CGT). For 2026/27, the CGT rate is 18% (basic rate) or 24% (higher rate). The annual CGT exemption is £3,000. Report via HMRC Self Assessment if your total crypto gains exceed £3,000 or proceeds exceed £50,000.

Does Polymarket KYC apply to UK users?

Yes. Polymarket requires KYC (Know Your Customer) verification for all users, including UK residents. You must provide a government-issued photo ID and a selfie. The process typically takes 5–10 minutes via their ID verification provider.

What is the legal difference between Polymarket and Betfair Exchange for UK traders?

Betfair Exchange is UKGC-licensed, meaning UK consumer protections apply and winnings are typically tax-free. Polymarket is not UKGC-licensed — it operates under decentralised blockchain rules. Profits from Polymarket are subject to HMRC CGT as crypto disposals. Choose based on your regulatory preference and tax situation.