Platform comparison
| Platform | YES odds | NO odds | Fee | KYC | Settlement | |
|---|---|---|---|---|---|---|
Polymarket (via Polymarket Legal UK) Pick polygram.ink (preferred broker) |
100% | 0% | 0% (USDC on-chain) | No-KYC up to $1,500 | USDC, auto via UMA oracle | Trade this market → |
Polymarket (direct) polymarket.com |
100% | 0% | 0% | Geo-blocked in US/UK/EU | USDC, on-chain | Trade this market → |
Kalshi kalshi.com |
— | — | Up to 7% per trade | US-only, KYC required | USD | Trade this market → |
Betfair Exchange betfair.com |
— | — | 2-5% commission | Full KYC from first trade | GBP / EUR | Trade this market → |
Manifold Markets manifold.markets |
— | — | Play-money (mana) | None — play-money | Mana (no cash-out) | Trade this market → |
Outcome probabilities
Current market-implied probability for each outcome, from the live order book.
| Outcome | Probability |
|---|---|
| 33°C | 100% |
| 28°C or below | 0% |
| 29°C | 0% |
| 30°C | 0% |
| 31°C | 0% |
| 32°C | 0% |
| 34°C | 0% |
| 35°C | 0% |
| 36°C | 0% |
| 37°C | 0% |
| 38°C or higher | 0% |
Market context
Tokyo’s highest temperature on 16 July 2026 will be recorded at the Tokyo Haneda Airport Station and resolved via Wunderground’s daily history, with the market currently pricing a 0% chance of any outcome other than the implied ranges. Historical July highs in Tokyo typically cluster between 31°C and 35°C, with 33°C and 34°C emerging as the frontrunners in the live market, holding 40% and 28% probabilities respectively [1]. This distribution aligns with past decade averages, where extreme heat days above 35°C occur infrequently but are not impossible, suggesting the 0% crowd-implied probability for “YES” likely reflects a binary framing rather than a genuine expectation of no measurable temperature.
Traders should monitor Japan Meteorological Agency forecasts released daily at 09:00 JST, alongside real-time Wunderground updates for RJTT, as sudden shifts in cloud cover or sea breeze patterns can alter peak temperatures within hours. Recent heatwave alerts in eastern Japan, including a 34°C reading in Chiba on 14 July, signal elevated risk for similar conditions in Tokyo [1]. Regulatory accessibility hinges on jurisdiction: German GlüStV restrictions may block access for residents unless licensed, while US CFTC reach limits participation for US persons without KYC. The “no-KYC up to $1,500” threshold permits anonymous entry for smaller positions, enhancing accessibility for non-US, non-German traders, though settlement remains tied to official Wunderground data regardless of regulatory status.
Sources: 1
Methodology
This overview of Highest temperature in Tokyo on July 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.
FAQ
- 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.
- Can I trade anonymously?
- Pseudonymously, yes — up to the KYC threshold. Polymarket Legal UK 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.
- What happens during a tax audit?
- You're responsible for documenting your trades. Polymarket Legal UK exports a full transaction history (CSV/PDF) for tax reporting. In an audit you'll need to present these documents.
- 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.
- What if regulation changes?
- If regulation changes in your jurisdiction (e.g. prediction markets are banned), Polymarket Legal UK would geo-block the affected region and continue processing withdrawals. Your funds remain withdrawable at any time.
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