Highest temperature in Wellington on August 15?

Platform comparison

Market context

Wellington's maximum temperature on 15 August 2026 will be measured at the airport weather station and resolved against the Daily Observations table on Weather Underground. The settlement window closes at midday UTC on that date, meaning the highest temperature recorded during the full calendar day in Wellington will determine the outcome across defined temperature bands.

August is Wellington's coldest month, with historical daily maxima typically ranging between 11–13 °C. Data from the National Institute of Water and Atmospheric Research shows that temperatures exceeding 15 °C on mid-August dates occur in roughly 15–20% of years, whilst readings above 18 °C are rare. The 0% crowd probability suggests traders are pricing in an expectation aligned with or below the long-term median for the season. Comparable August days at Wellington Airport over the past two decades establish a baseline: most settle in the 10–14 °C range, with occasional outliers driven by föhn wind patterns from the north.

Traders should monitor the Southern Oscillation Index and sea-surface temperature anomalies in the weeks preceding mid-August 2026, as these influence whether anticyclonic systems bring warm northerly flows to the Wellington region. The MetService forecast issued in early August will provide the most actionable signal for directional movement. Any unusual warming trend across the Tasman in late July or early August could shift probabilities materially, particularly for bands above 16 °C. The resolution source's reliance on the Daily Observations table rather than summary figures means traders should verify historical station data consistency before committing capital.

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 15? 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

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.

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.