Platform comparison
| Platform | YES odds | NO odds | Fee | KYC | Settlement | |
|---|---|---|---|---|---|---|
Polymarket (via Is Kalshi Legal in California) Pick polygram.ink (preferred broker) |
98% | 2% | 0% (USDC on-chain) | No-KYC up to $1,500 | USDC, auto via UMA oracle | Go to the live market → |
Polymarket (direct) polymarket.com |
98% | 2% | 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 |
|---|---|
| 11°C | 98% |
| 12°C | 1% |
| 5°C or below | 0% |
| 6°C | 0% |
| 7°C | 0% |
| 8°C | 0% |
| 9°C | 0% |
| 10°C | 0% |
| 13°C | 0% |
| 14°C | 0% |
| 15°C or higher | 0% |
Market context
The underlying event is the highest temperature recorded at Wellington International Airport on 1 August 2026, with the market settling to the temperature band containing that day’s maximum on Wunderground. Wellington’s August climate is typically cool and fairly stable, with average highs around 11–14°C and frequent rain, so the distribution of outcomes is usually clustered well below summer levels.[1][2][3][4]
For context, the crowd-implied 0% YES is consistent with a market that has not yet been given a weather shock to price in. Historical August data for Wellington show monthly record highs in the mid-teens Celsius, with recent August peaks reported around 15.8°C in 2022, while typical daily highs sit near 11–13°C; that makes an unusually warm 1 August possible, but still dependent on a brief synoptic setup rather than the seasonal norm.[4][6][9] The current price should therefore be read as a statement about low probability rather than impossibility.
The main catalysts are weather-model updates, local forecast revisions, and any short-lived warm air advection or clearing trend that could lift daytime maxima around the airport before the settlement cutoff. Because this market is tied to a specific station and a single day’s maximum, traders should watch hourly forecast shifts rather than the broader monthly outlook. From a market-access perspective, German GlüStV rules can limit participation in online gambling-style products for users in Germany, US CFTC jurisdiction can matter if the product is deemed a derivatives contract, and “no-KYC up to $1,500” generally means smaller accounts may open and trade with lighter identity checks, although withdrawal, volume, or jurisdictional limits can still apply.
Methodology
This overview of Highest temperature in Wellington on August 1? 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
- 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.
- 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.
- 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.
- 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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