Highest temperature in Tokyo on June 30?

Platform comparison

Market context

The real-world event in question is the highest temperature recorded at Tokyo Haneda Airport on 30 June 2026, measured in degrees Celsius and resolved via Wunderground data. Historical precedents frame the current 0% crowd-implied probability for a “YES” outcome (typically denoting a specific high range) with stark clarity: Japan recently hit 41.2°C in Tamba during its hottest June ever, while Tokyo itself reached 36.4°C in a record-breaking June 147 years ago[1][8]. Haneda’s own June 2026 forecast anticipates daily highs between 75°F and 83°F (roughly 24°C–28°C), with the average high at 80°F[2]. Given that extreme heatwaves have already pushed Tokyo to 35°C+ for ten consecutive days in past summers, a 0% probability suggests the market expects temperatures to stay well below the threshold defining the “YES” range, aligning with typical Haneda June norms rather than national record extremes[10].

Traders should monitor official weather agency announcements, particularly the Japan Meteorological Agency’s daily heatwave bulletins and any sudden shifts in the Pacific high-pressure system that could trigger unseasonal spikes. Recent reports confirm Tokyo logged its first June with over 30°C midsummer days in 11 months, indicating rising volatility in early summer temperatures[7]. Dependencies include Wunderground’s data latency and the precise timing of the settlement window ending 12:00 UTC on 30 June 2026. From a regulatory standpoint, German GlüStV implications may restrict access for residents unless the platform complies with state gambling licences, while US CFTC reach could classify this as a derivatives contract requiring KYC beyond $1,500. The “no-KYC up to $1,500” feature enhances accessibility for smaller traders but does not exempt larger positions from compliance, a nuance critical for market participants operating across jurisdictions.

Sources: 1 · 2 · 3 · 4 · 5

Methodology

This overview of Highest temperature in Tokyo on June 30? 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

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FAQ

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Pseudonymously, yes — up to the KYC threshold. Polymarket Germany Legal stores an email address and wallet addresses rather than a legal name. Over $1,500 lifetime volume triggers KYC, after which identity is no longer anonymous.

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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.

What if regulation changes?

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