Platform comparison
| Platform | YES odds | NO odds | Fee | KYC | Settlement | |
|---|---|---|---|---|---|---|
Polymarket (via Is Kalshi Legal in California) Pick polygram.ink (preferred broker) |
100% | 0% | 0% (USDC on-chain) | No-KYC up to $1,500 | USDC, auto via UMA oracle | Go to the live market → |
Polymarket (direct) polymarket.com |
100% | 0% | 0% | Geo-blocked in US/UK/EU | USDC, on-chain | Go to the live market → |
Kalshi kalshi.com |
— | — | Up to 7% per trade | US-only, KYC required | USD | Go to the live market → |
Betfair Exchange betfair.com |
— | — | 2-5% commission | Full KYC from first trade | GBP / EUR | Go to the live market → |
Manifold Markets manifold.markets |
— | — | Play-money (mana) | None — play-money | Mana (no cash-out) | Go to the live market → |
Outcome probabilities
Current market-implied probability for each outcome, from the live order book.
| Outcome | Probability |
|---|---|
| 32°C | 100% |
| 25°C or below | 0% |
| 26°C | 0% |
| 27°C | 0% |
| 28°C | 0% |
| 29°C | 0% |
| 30°C | 0% |
| 31°C | 0% |
| 33°C | 0% |
| 34°C | 0% |
| 35°C or higher | 0% |
Market context
The market hinges on the highest temperature recorded at Tokyo Haneda Airport Station on 17 July 2026, a date that falls squarely within Japan’s *Manatsu* (midsummer) phase when humidity exceeds 75% and daily highs typically range between 25°C and 33°C[3]. Current crowd-implied probability of 0% for any outcome below 32°C appears inconsistent with historical mid-July patterns, where 32°C is the frontrunner at 100% probability on Polymarket[1]. Comparable cases from recent years show Tokyo routinely hitting 32–34°C in mid-July, with the rainy season (*Tsuyu*) ending by early July and leaving behind hot, sunny conditions[3].
Traders should monitor the Japan Meteorological Agency’s daily forecast releases for the Tokyo region, particularly any updates on heatwave advisories or cloud cover that could suppress peak temperatures. A recent travel advisory for July 2026 emphasises the intensity of summer heat in Tokyo, recommending light clothing and sun protection as non-negotiable due to consistent high temperatures[2]. The settlement depends entirely on Wunderground’s recorded data for Tokyo Haneda Airport Station, so any discrepancy between forecast models and actual station readings will drive final resolution.
Regulatory accessibility is shaped by German GlüStV implications, which restrict unlicensed betting platforms, and US CFTC reach, which may classify such markets as derivatives requiring compliance. The ‘no-KYC up to $1,500’ feature allows traders to access this weather market without identity verification, but only within jurisdictions where such anonymity is permitted under local law. This creates a fragmented access landscape where German and US participants face stricter barriers than those in jurisdictions with lighter oversight.
Methodology
This overview of Highest temperature in Tokyo on July 17? 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
- 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.
- Can I trade anonymously?
- Pseudonymously, yes — up to the KYC threshold. Is Kalshi Legal in California 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.
- 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).
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