Platform comparison
| Platform | YES odds | NO odds | Fee | KYC | Settlement | |
|---|---|---|---|---|---|---|
Polymarket (via Trump Prediction) Pick polygram.ink (preferred broker) |
100% | 0% | 0% (USDC on-chain) | No-KYC up to $1,500 | USDC, auto via UMA oracle | Live odds → |
Polymarket (direct) polymarket.com |
100% | 0% | 0% | Geo-blocked in US/UK/EU | USDC, on-chain | Live odds → |
Kalshi kalshi.com |
— | — | Up to 7% per trade | US-only, KYC required | USD | Live odds → |
Betfair Exchange betfair.com |
— | — | 2-5% commission | Full KYC from first trade | GBP / EUR | Live odds → |
Manifold Markets manifold.markets |
— | — | Play-money (mana) | None — play-money | Mana (no cash-out) | Live odds → |
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 Airport is currently forecast to reach the high teens in Celsius only in the broadest sense of the forecast, but the market resolves on the *single highest reading* recorded in Weather Underground’s Daily Observations table at Wellington Intl Airport Station, not the headline high/low summary. Current public forecasts cluster around a cool, cloudy day with breezy northerlies and a daytime high near 12–14°C, which would make a 0% YES price consistent with the idea that an unusually warm spike looks unlikely in the settlement window.[2][3][12]
Historically, Wellington’s August temperatures are fairly tightly bounded. AccuWeather’s monthly forecast puts daily highs for August 2026 mostly between 53°F and 60°F, and WeatherSpark says August highs in Wellington are usually around 54°F, rarely exceeding 59°F; that is about 12–15°C, which frames this market as a narrow-range weather bet rather than a search for a large upside surprise.[1][10][16] In other words, the crowd is leaning on climatology plus a chilly, unsettled synoptic pattern rather than on any expectation of a late warm burst.
The main catalyst for traders is the intraday observation path at Wellington Airport: if temperatures briefly touch the top end of the forecast, the market can move even if the official “day high” summary lags or differs from the Daily Observations table. Weather Underground’s hourly outlook points to cloudy conditions and rain developing later, with no strong signal for a sharp daytime warm-up, while AccuWeather and WeatherWatch both flag steady cloud, breeze and rain, which tend to cap maximum temperatures.[11][2][4] The key dependency is the exact midday-to-afternoon observation sequence, not the overnight low or any broader regional forecast.
Methodology
Political prediction markets differ structurally from sports betting: thinner liquidity, longer settlement windows, higher sensitivity to single news events. This page shows the live Polymarket quote for Highest temperature in Wellington on August 8? plus platform attributes for the three reference venues, so you can see at a glance where the deepest market for this question sits.
Resolution & payout
Political markets typically settle on official candidate or agency confirmation. Polymarket uses UMA Optimistic Oracle: a proposer posts the outcome with a bond, the two-hour window opens, then the smart contract pays USDC.
Kalshi settles USD via CFTC clearinghouse, with clearly defined resolution sources (e.g. AP race calls for elections). Betfair settles after the official outcome is registered with the league or agency. Manifold is play-money.
UK Frequently Asked Questions
- How accurate are political prediction markets?
- Historically more accurate than polls. Polymarket's Brier score on US 2024 elections was ~0.11 — better than 538 (~0.14) and every mainstream poll. Markets aggregate information with real skin in the game.
- What resolution source is used for elections?
- Polymarket defines the source per contract — usually Associated Press (AP Race Call), Reuters or the official electoral commission. The source is stated in contract details before the market opens.
- How fast do political markets react to news?
- High-liquidity markets move within seconds to minutes. A Trump tweet on the economy can shift the "Trump 2024" market 2-5 points before mainstream media has written anything.
- Are political prediction markets legal in my country?
- It varies. They sit in legal gray areas in most jurisdictions. Polymarket is geo-blocked from US/UK/EU; some broker frontends have a different geo footprint. Trade only with capital you can afford to lose, and only if you understand the legal status in your jurisdiction.
- Are UK election prediction markets available from the UK?
- Yes. Betfair Exchange and Smarkets offer UKGC-regulated UK election markets (seat counts, party share, constituency results). Polymarket also lists UK election contracts with deeper global liquidity. Betfair winnings are typically tax-free for UK individuals; Polymarket profits are subject to HMRC CGT.
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