Highest temperature in Tokyo on July 4?

Platform comparison

Market context

The real-world event hinges on the peak heat recorded at Tokyo Haneda Airport on 4 July 2026, specifically the highest temperature in degrees Celsius measured at any time that day. Historical data frames the current 0% crowd-implied probability for lower ranges as highly conservative; July in Tokyo is consistently humid with average highs near 28.7°C and recent records showing Japan hitting 41.2°C in Tamba City just last year [8][9]. Comparable markets for 3 July 2026 already assign a 100% probability to 26°C, suggesting the atmosphere is primed for significant heat rather than cool anomalies [1].

Traders must monitor the Japan Meteorological Agency’s daily forecasts and global model updates for overnight lows, which are currently projected between 20–21°C, as these often dictate daytime peaks [2]. A key catalyst is the ongoing trend of record-breaking summer temperatures, with Japan’s average July heat hitting a record high for the third consecutive year [9]. Regulatory accessibility remains a factor: German GlüStV implications and US CFTC reach create a complex landscape, yet the “no-KYC up to $1,500” threshold allows immediate participation for this specific market without identity verification hurdles, provided local laws permit it.

Sources: 1 · 2 · 3 · 4 · 5

Methodology

This overview of Highest temperature in Tokyo on July 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. Polymarket Tax UK has a different geo footprint.

Do I need to KYC for Polymarket Tax UK?

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).