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Highest temperature in Tokyo on July 23?

Regulatory snapshot for "Highest temperature in Tokyo on July 23?": platform geo-block status, KYC thresholds, tax implications.

35°C 100% 29°C or below 0% 30°C 0% 31°C 0% Volume: $72K Liquidity: $260K Closes: 23 Jul 2026
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Highest temperature in Tokyo on July 23?

Platform comparison

PlatformYES oddsNO oddsFeeKYCSettlement
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.

OutcomeProbability
35°C100%
29°C or below0%
30°C0%
31°C0%
32°C0%
33°C0%
34°C0%
36°C0%
37°C0%
38°C0%
39°C or higher0%

Market context

Tokyo’s peak temperature is measured at Haneda Airport Station and resolved from the day’s highest reading on Wunderground, so the live question is whether conditions support a top-end July maximum rather than the noon-to-evening average. Tokyo’s July climate normally centres on about 30°C by day, with high humidity and a fair amount of cloud or rain, which can cap extremes even when the broader summer pattern is warm.[1]

A 0% crowd-implied probability points to a market that is pricing in either an unusually low maximum or, more likely, a very narrow path to the settlement band. Historical comparables suggest that Tokyo in July is typically warm enough for the upper 20s to low 30s Celsius, but the actual print can be pulled down by cloud cover, sea breeze, or rainfall, and pushed up when the city sits under a strong high-pressure ridge.[1] For a settlement that depends on the single highest reading during the day, the key issue is less the average forecast than whether the afternoon can briefly spike before any cooling after rain or convection.

Traders should watch the JMA and airport-hourly forecast updates, plus any late shifts in typhoon tracks, monsoon front position, or rainband timing, because those factors can change the day’s maximum quickly. On the access side, German GlüStV treatment matters because some platforms restrict participation from Germany or require additional checks where a product is deemed gambling-linked; US CFTC reach is relevant because even offshore access can be scrutinised if a venue is offering event contracts to US persons. “No-KYC up to $1,500” usually means smaller deposits or withdrawals can be used with lighter identity checks, but it does not necessarily remove country blocks, payment screening, or market-specific restrictions for this Tokyo temperature contract.

Sources: 1

Methodology

This overview of Highest temperature in Tokyo on July 23? 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.
What happens during a tax audit?
You're responsible for documenting your trades. Is Kalshi Legal in California 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), Is Kalshi Legal in California would geo-block the affected region and continue processing withdrawals. Your funds remain withdrawable at any time.
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