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 |
|---|---|
| 31°C | 100% |
| 25°C or below | 0% |
| 26°C | 0% |
| 27°C | 0% |
| 28°C | 0% |
| 29°C | 0% |
| 30°C | 0% |
| 32°C | 0% |
| 33°C | 0% |
| 34°C | 0% |
| 35°C or higher | 0% |
Market context
The real-world event hinges on the peak temperature recorded at Guangzhou Baiyun International Airport on 7 July 2026, with the market currently pricing a 0% chance of the specific outcome being met. Historical data frames this probability starkly: July in Guangzhou typically sees daily highs around 91°F (33°C), rarely dipping below 85°F or exceeding 96°F, while the hottest days can reach 39°C (102°F) [2][8]. Recent climate trends show July 2024 was the highest average since 1961 at 23.2°C, yet peak temperatures on specific days often deviate significantly from averages [3]. A comparable Lines.com market for 3 July 2026 priced a 27.5% chance of exactly 34°C, which ultimately resolved YES, illustrating that single-day peaks frequently cluster near 34°C but remain volatile [1].
Traders must monitor imminent weather forecasts and official meteorological announcements for the Baiyun station, as thunderstorms with heavy rain are common in early July and can suppress peak temperatures [4]. The settlement relies exclusively on Wunderground data, making the platform’s update schedule a critical dependency for resolution accuracy [6]. Recent reports confirm Guangzhou is experiencing its longest summer since 1961, suggesting a higher likelihood of elevated peaks despite typical rainfall [5]. Regulatory accessibility is also a factor; German GlüStV and US CFTC frameworks impose strict KYC rules, yet markets offering "no-KYC up to $1,500" allow broader participation for this specific weather event without triggering full identity verification [1]. This regulatory nuance directly impacts liquidity and the speed at which crowd-implied probabilities adjust to new forecast data.
Methodology
This overview of Highest temperature in Guangzhou on July 7? 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.
- Can I trade anonymously?
- Pseudonymously, yes — up to the KYC threshold. Is Kalshi Legit 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 Legit exports a full transaction history (CSV/PDF) for tax reporting. In an audit you'll need to present these documents.
- 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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