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 |
|---|---|
| 13°C | 100% |
| 7°C or below | 0% |
| 8°C | 0% |
| 9°C | 0% |
| 10°C | 0% |
| 11°C | 0% |
| 12°C | 0% |
| 14°C | 0% |
| 15°C | 0% |
| 16°C | 0% |
| 17°C or higher | 0% |
Market context
Wellington’s temperature on 8 August will be set by the **highest reading in Weather Underground’s Daily Observations table** for Wellington Intl Airport Station, not the broader Day High & Low summary. With the market currently showing 0% for YES, the implied view is that the observed peak will fall outside the listed range, so the main practical issue is whether the airport station prints an unexpectedly warm afternoon value before the settlement cutoff. Weather Underground’s page is already showing a modest daytime peak around the mid-50s °F, which is consistent with a cool August profile in Wellington rather than a sharp warming event.[1][6][11][12]
The historical frame supports caution around very low probabilities rather than certainty. August in Wellington is typically cool and stable, with average highs around 12°C and occasional year-to-year variation that is usually limited rather than extreme.[6][7][11][14] Comparable weather-history pages for the city show August highs commonly clustering in the low teens Celsius, which makes a late-day jump into a materially higher band possible but not typical.[3][6][7] For a prediction market, that means a 0% quote is less a claim that the event cannot happen than a signal that the crowd sees the required temperature band as highly unlikely under ordinary Wellington winter conditions.[6][11]
Traders should watch the live Weather Underground observation feed through the afternoon, because the settlement will turn on the table entries rather than forecast text or summary figures.[1][13][15] The accessible-access layer also matters: “no-KYC up to $1,500” means a user can usually trade within that cap without full identity checks, but higher activity will trigger verification, which can affect who can participate quickly in a fast-moving weather market. On the regulatory side, German access is shaped by the GlüStV framework for gambling-style products, while US-facing activity can fall within the CFTC’s reach if the market is treated as a commodity derivative or event contract, so availability and compliance can differ by jurisdiction even for the same temperature question.
Methodology
This overview of Highest temperature in Wellington on August 8? 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.
- 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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