Highest temperature in Wellington on July 20?

Platform comparison

Market context

The market assesses the likelihood of specific temperature ranges for the highest reading at Wellington International Airport on 20 July 2026, with the crowd currently assigning zero probability to any outcome above the frontrunner bracket. Polymarket data indicates the 12°C range holds a 100% implied probability, effectively ruling out higher temperatures as the settlement window closes at noon UTC on the target date [1]. This extreme consensus suggests traders view the forecast as settled, leaving no room for significant deviation in the final resolution.

Historical July patterns in Wellington typically feature cool, maritime conditions with frequent southerly winds, aligning with the current 15°C reading observed at the airport and the prevailing south-south-westerly flow [2]. Comparable cases from recent mid-summer winters show maximums rarely exceeding 14°C, reinforcing the market’s heavy weighting on the 12°C outcome as the statistically probable ceiling. The 0% probability for higher ranges reflects this consistent climatic behaviour rather than a sudden anomaly.

Traders should monitor real-time updates from Wunderground, the designated resolution source, for any unexpected shifts in the daily maximum as the day progresses [1]. While no scheduled political debates or campaign disclosures influence weather outcomes, the primary catalyst remains the live temperature feed itself, which will determine the final range. With the settlement deadline imminent, the market leans entirely on the Wunderground record for NZWN, leaving no scope for external political or economic catalysts to alter the outcome.

Sources: 1 · 2

Methodology

This page tracks Highest temperature in Wellington on July 20? across four political prediction venues. Live odds come from the Polymarket order book (the deepest political prediction-market book). Kalshi is the CFTC-regulated US alternative, Betfair the established UK sports-exchange with politics markets, Manifold the open play-money variant. For users geo-blocked from Polymarket directly, brokers like Election Predictions UK provide a 0%-fee route into the same order book.

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

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.

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.

Why do Polymarket and Kalshi differ on elections?

Kalshi must follow CFTC compliance — strict definitions, clear resolution sources, US citizens only with KYC. Polymarket operates globally without CFTC oversight — deeper liquidity, but also higher regulatory risk.

Which political events have the biggest volume?

US Presidential election, party nominations (DNC/RNC), Senate majorities, individual state outcomes (Pennsylvania, Michigan, Wisconsin), and major European elections. Peak markets reach $50-500M per event.