Highest temperature in Wellington on July 21?

Platform comparison

Market context

Wellington is experiencing a cool, cloudy July morning with temperatures hovering around 15°C and strong south-south-westerly winds, setting the baseline for the day’s peak heat. The prediction market currently assigns a 0% probability to any outcome above the implied threshold, reflecting the crowd’s certainty that extreme warmth is impossible under these conditions. This aligns with the current frontrunner of 12°C, which holds a 61% market share, while 11°C follows at 31%, suggesting traders expect the day’s maximum to remain firmly in the low teens [2].

Historically, Wellington’s July highs rarely exceed 14°C, with the city’s maritime climate and frequent wind suppressing heat accumulation. Comparable cases from recent winters show that even on sunny days, peak temperatures typically stall between 10°C and 13°C due to the persistent influence of the Tasman Sea. The current 0% probability for higher ranges is consistent with this pattern, as the atmospheric setup—cloud cover, high humidity, and strong winds—mirrors conditions that have historically capped daily maxima well below 15°C [1][3].

Traders should monitor real-time updates from Wunderground, the official resolution source, for any unexpected shifts in wind direction or cloud dissipation that could briefly elevate temperatures. While no scheduled political debates or campaign disclosures influence weather, sudden changes in the south-westerly flow could act as a catalyst for a higher peak. The market leans heavily on the immediate meteorological data, with the BBC and AccuWeather confirming the current chill and cloudiness as the dominant factors shaping the day’s outcome [1][3].

Sources: 1 · 2 · 3

Methodology

This page tracks Highest temperature in Wellington on July 21? 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

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.

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.

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 Election Predictions UK 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.

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.