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 |
|---|---|
| 14°C | 100% |
| 8°C or below | 0% |
| 9°C | 0% |
| 10°C | 0% |
| 11°C | 0% |
| 12°C | 0% |
| 13°C | 0% |
| 15°C | 0% |
| 16°C | 0% |
| 17°C | 0% |
| 18°C or higher | 0% |
Market context
The relevant event is the highest air temperature recorded at Wellington International Airport during the full 24 July window, with settlement based on the Wunderground history page for NZWN. BBC Weather shows Wellington at about 10°C pre-dawn with light northerly flow and steady pressure, which is consistent with a cool start rather than an already-warm day, but it does not determine the eventual daily high.[1]
A 0% crowd-implied probability for a higher-temperature outcome is best read as an extreme market view rather than a forecast of certainty. In a city like Wellington, winter highs can still vary materially with wind shift and cloud breaks, so the market outcome is usually driven by the day’s synoptic setup and any brief mid-day warming rather than the early-morning reading alone. Comparable weather-resolution markets are often thinly priced until local forecasts and observed conditions converge, so a zero quote typically reflects either sparse participation or a strong expectation that the final maximum will stay in the lowest band.
For accessibility, the regulatory frame matters as much as the weather. In Germany, the GlüStV regime treats many online games of chance and gambling-style products as heavily regulated, so platform availability and local access can be constrained even where the market itself is informational rather than recreational. In the US, the CFTC’s reach is relevant because event contracts can fall under derivatives scrutiny if offered to US persons, which affects who can lawfully participate. “No-KYC up to $1,500” usually means a user may trade or withdraw within that cap without completing full identity verification, but access to this specific market still depends on jurisdiction, platform policy, and any country-level restrictions rather than the balance threshold alone.
Sources: 1
Methodology
This overview of Highest temperature in Wellington on July 24? 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.
- How are winnings taxed?
- Tax treatment varies by jurisdiction. In most countries, prediction market gains are treated as ordinary income or capital gains. We cannot provide tax advice — consult a tax professional for your specific situation.
- 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.
- 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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