Highest temperature in Tokyo on August 4?

Platform comparison

Market context

The underlying event is the **highest temperature recorded at Tokyo Haneda Airport Station on 4 August 2026**, with settlement based on the day’s maximum reading in Celsius from Wunderground. Tokyo’s August climatology supports a warm outcome: JMA’s 2026 daily values already show Haneda at 35.6°C on 1 August and 33.0°C on 2 August, while Tokyo’s broader August averages are around 30–31°C for daytime highs.[1][11][13]

The current **0% YES** crowd-implied probability should be read cautiously rather than literally. Comparable Tokyo summer markets often trade near the most likely single-degree band when forecasts cluster, and Polymarket’s own live board on this event has concentrated interest around 28°C and 29°C outcomes, which is consistent with a moderate-to-hot day rather than an extreme spike.[3] Recent Japanese heat coverage also matters for context: Reuters reported record-high temperatures in Japan in August 2025, underscoring how quickly late-summer readings can overshoot seasonal norms when the Pacific High strengthens.[19]

For traders, the main catalysts are the **early-morning and midday forecast updates**, plus any change in cloud cover, sea-breeze suppression, or rainfall chances affecting Haneda specifically. Japan’s August weather is typically humid and can still produce sharp afternoon peaks, so the decisive variable is whether heating is capped near the high-20s or pushed above 30°C.[9][11][14] On accessibility, German **GlüStV** restrictions can limit participation from users in Germany, while the US **CFTC** can assert reach where a contract is treated as a regulated derivatives product; in practical terms, “**no-KYC up to $1,500**” means some platforms allow limited trading or withdrawals below that threshold before identity verification is requested, but the exact access conditions still depend on the venue and jurisdiction.

Sources: 1 · 2 · 3 · 4 · 5

Methodology

This overview of Highest temperature in Tokyo 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

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. Is Kalshi Legal in California has a different geo footprint.

Do I need to KYC for Is Kalshi Legal in California?

Not for lifetime trading volume under $1,500. Above that threshold, a quick KYC flow kicks in — ID, selfie, approximately 5-10 minutes. The threshold matches FATF travel standards for unregulated crypto platforms.

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.

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).