Platform comparison
| Platform | YES odds | NO odds | Fee | KYC | Settlement | |
|---|---|---|---|---|---|---|
Polymarket (via Is Kalshi Legit) Pick polygram.ink (preferred broker) |
100% | 0% | 0% (USDC on-chain) | No-KYC up to $1,500 | USDC, auto via UMA oracle | See live odds → |
Polymarket (direct) polymarket.com |
100% | 0% | 0% | Geo-blocked in US/UK/EU | USDC, on-chain | See live odds → |
Kalshi kalshi.com |
— | — | Up to 7% per trade | US-only, KYC required | USD | See live odds → |
Betfair Exchange betfair.com |
— | — | 2-5% commission | Full KYC from first trade | GBP / EUR | See live odds → |
Manifold Markets manifold.markets |
— | — | Play-money (mana) | None — play-money | Mana (no cash-out) | See live odds → |
Outcome probabilities
Current market-implied probability for each outcome, from the live order book.
| Outcome | Probability |
|---|---|
| 37°C | 100% |
| 29°C or below | 0% |
| 30°C | 0% |
| 31°C | 0% |
| 32°C | 0% |
| 33°C | 0% |
| 34°C | 0% |
| 35°C | 0% |
| 36°C | 0% |
| 38°C | 0% |
| 39°C or higher | 0% |
Market context
On 11 August 2026, the highest temperature recorded at Shenzhen Bao'an International Airport Station will fall into one of several defined ranges. The market resolves using the Daily Observations table from Weather Underground rather than summary figures, a distinction that matters when intraday peaks diverge from headline highs. Shenzhen's August climate typically produces daily maxima between 32–35 °C, though extreme heat events can push readings above 36 °C. The current 0% crowd probability suggests traders are either confident in a specific lower range or have not yet engaged with this particular settlement window.
Historical August temperatures at Bao'an show consistent patterns: the past decade's August averages cluster around 32–34 °C on most days, with occasional spikes to 35–36 °C during heat waves. The 2023 summer saw several days exceed 35 °C in early August across Guangdong Province, establishing precedent for elevated readings in this timeframe. Comparable airport-station observations from nearby regions indicate that tropical maritime influence and urban heat effects can sustain higher maxima than inland forecasts suggest, making the distinction between "typical" and "elevated" ranges material to resolution.
Traders should monitor China Meteorological Administration forecasts released in early August 2026 and track any tropical cyclone activity in the South China Sea, which can suppress temperatures through cloud cover and precipitation. Real-time Weather Underground data feeds will determine the exact resolution figure; any discrepancies between the Daily Observations and Day High & Low sections will be adjudicated in favour of the former. From a regulatory standpoint, this market's accessibility under no-KYC thresholds (up to $1,500 USD equivalent in many jurisdictions) and its classification under German GlüStV and US CFTC frameworks depends on the host platform's licensing; traders should verify their own jurisdiction's treatment of weather derivatives before participation.
Methodology
This overview of Highest temperature in Shenzhen on August 11? 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 Legit has a different geo footprint.
- Do I need to KYC for Is Kalshi Legit?
- 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.
- 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).
- What if regulation changes?
- If regulation changes in your jurisdiction (e.g. prediction markets are banned), Is Kalshi Legit would geo-block the affected region and continue processing withdrawals. Your funds remain withdrawable at any time.
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