Platform comparison
| Platform | YES odds | NO odds | Fee | KYC | Settlement | |
|---|---|---|---|---|---|---|
Polymarket (via Trump Prediction) Pick polygram.ink (preferred broker) |
80% | 20% | 0% (USDC on-chain) | No-KYC up to $1,500 | USDC, auto via UMA oracle | Live odds → |
Polymarket (direct) polymarket.com |
80% | 20% | 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 | 80% |
| 14°C | 9% |
| 12°C | 2% |
| 7°C or below | 0% |
| 8°C | 0% |
| 9°C | 0% |
| 10°C | 0% |
| 11°C | 0% |
| 15°C | 0% |
| 16°C | 0% |
| 17°C or higher | 0% |
Market context
Wellington's highest temperature on 28 July 2026 will be measured at the international airport weather station and resolved against historical records from Wunderground. July falls within Wellington's winter season in the Southern Hemisphere, when daytime highs typically range between 11–13°C, though occasional warm fronts can push temperatures several degrees higher. The 0% crowd probability suggests traders are pricing in an expectation of temperatures within the lower ranges for mid-winter, though the specific threshold triggering a YES resolution remains unspecified in available market documentation.
Historical July temperatures at Wellington Airport provide the baseline for calibrating expectations. Over the past decade, July daily highs have rarely exceeded 16°C, with most days settling between 8–14°C depending on weather system activity. Unusually warm July days—those reaching 17°C or above—occur roughly once every five to ten years, typically driven by northwesterly wind patterns that advect warmer air masses from lower latitudes. The current zero probability reflects confidence in a typical winter day rather than an outlier event.
Traders should monitor MetService forecasts and NIWA outlooks released in the days preceding 28 July 2026, as these will clarify whether any warm front or high-pressure system is expected to affect the Wellington region. Seasonal patterns and the Southern Oscillation Index status in mid-2026 may also influence whether conditions favour above-normal temperatures. The settlement window closes at noon UTC on the resolution date, giving traders access to morning forecasts before final pricing adjustments.
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 July 28? 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
For political markets the resolution source is decisive. Polymarket defines a concrete source per contract (e.g. AP, Reuters, official electoral commission) and uses the UMA Optimistic Oracle as the on-chain dispute mechanism. With a clearly defined outcome the USDC payout lands within minutes of the final confirmation.
FAQ
- 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.
- Can prediction markets influence election outcomes?
- Markets reflect expectations rather than create them. Studies show public-facing markets can anchor expectations, but don't influence the underlying outcome. Political markets are information, not advocacy.
- Which platform has the deepest political liquidity?
- Polymarket — by far. US 2024 presidential volume was ~$3.5B vs Kalshi (~$200M) and Betfair (~$120M). Where Polymarket is geo-blocked, brokers like Trump Prediction route into the same order book at 0% fees.
- 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.
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