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 |
|---|---|
| 15°C | 100% |
| 7°C or below | 0% |
| 8°C | 0% |
| 9°C | 0% |
| 10°C | 0% |
| 11°C | 0% |
| 12°C | 0% |
| 13°C | 0% |
| 14°C | 0% |
| 16°C | 0% |
| 17°C or higher | 0% |
Market context
The real-world event is the highest temperature at Wellington Airport on 10 August, measured in Celsius, and the market resolves from Weather Underground’s **Daily Observations** rather than the summary “Day High & Low” panel. That makes the relevant number a station-based daytime peak, not a broader city forecast, and Wellington’s August climate is usually cool and tightly clustered around the low teens Celsius, so small changes in the observed daily maximum matter more than the general seasonal average.[3][7][8]
The 0% crowd-implied YES price looks consistent with the fact that Wellington’s August highs are typically around 11–13°C, with Weather Underground’s own history page showing a recent daily high of 59°F and an August record high of 63°F in its historical summary. Comparable climatology sources likewise put August daily highs near 12°C, which means a resolution into a higher temperature band would generally require an unusually warm day rather than a routine winter reading.[1][2][3][7] For market reading, that leaves the downside-heavy price as a reflection of the station’s normal winter profile, not just a forecast headline.[1][2]
On accessibility, the regulatory frame matters because prediction markets can sit differently under German and US rules: under Germany’s **GlüStV**, gambling-style offerings face licensing and consumer-protection constraints, while in the US the **CFTC** can reach event contracts that look like derivatives rather than ordinary betting products. A “no-KYC up to $1,500” policy usually means a user can trade or withdraw only within that threshold before identity verification is required, which improves access but does not remove location-based restrictions or legal gating for this specific weather market.
Methodology
This overview of Highest temperature in Wellington on August 10? 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.
- 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.
- 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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