Highest temperature in Tokyo on August 16?

Platform comparison

Market context

On 16 August 2026, the highest temperature recorded at Tokyo Haneda Airport Station will fall into one of several defined ranges measured in degrees Celsius. The resolution hinges on the Daily Observations table from Weather Underground rather than summary figures, a distinction that matters when intraday peaks differ from headline highs. Tokyo's August climate typically produces readings between 30–35°C, though heat waves can push beyond 36°C. The current crowd probability of 0% suggests either extreme confidence in a specific temperature band or insufficient liquidity across the full range of outcomes.

Historical August temperatures at Haneda show considerable year-to-year variation. Between 2015 and 2024, daily highs ranged from 28°C to 37°C, with most years clustering around 32–34°C. The 2023 summer saw multiple days exceed 35°C across the Kanto region, whilst cooler patterns in 2019 kept peaks closer to 30°C. This volatility means no single outcome carries overwhelming historical weight; traders assessing the 0% probability should consider whether it reflects genuine consensus or a gap in market participation across less-favoured temperature bands.

From a regulatory standpoint, this market operates under German GlüStV provisions if accessed from the EU, with US CFTC oversight applying to US-based participants. The no-KYC threshold of $1,500 USD means traders can enter positions below that sum without identity verification on compliant platforms, lowering friction for casual participation. However, larger positions or cumulative trading activity may trigger enhanced due diligence. Weather markets typically attract lower volumes than political or financial events, so liquidity constraints and wide spreads are common considerations when sizing exposure.

Methodology

This overview of Highest temperature in Tokyo on August 16? 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.