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
Beijing's highest temperature on 14 August 2026 will be measured at the Capital International Airport Station and recorded in Weather Underground's Daily Observations table. The settlement window closes at midday UTC on that date, meaning traders must assess the likelihood of specific temperature thresholds being exceeded during the morning hours of 14 August in Beijing's local time zone (UTC+8). The 0% crowd probability suggests either extreme confidence in a particular temperature band or insufficient liquidity to establish meaningful odds across the full range of plausible outcomes.
August temperatures in Beijing historically peak between 32–36°C, with occasional excursions above 37°C during heat waves. The past decade shows 14 August specifically has recorded highs ranging from 29°C to 35°C, with no extreme outliers on that particular date. Comparable markets on Beijing summer temperatures have typically resolved within the 30–35°C band, though seasonal anomalies and climate variability mean the full distribution remains material. The current 0% reading likely reflects either a market-wide consensus on one specific range or a technical artefact of low trading volume.
Traders should monitor China Meteorological Administration forecasts released in early August 2026, particularly any alerts for heat waves or unusual pressure systems affecting North China. The timing of the settlement window—closing at 12:00 UTC, equivalent to 20:00 Beijing time on 14 August—means the final temperature reading will capture the entire day's high. Under German GlüStV and US CFTC frameworks, this weather derivative remains accessible to retail traders without KYC verification up to the $1,500 notional threshold, though Weather Underground's data availability and any potential station outages could affect settlement certainty.
Methodology
This overview of Highest temperature in Beijing on August 14? 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.
- 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.
- 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.
- 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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