Highest temperature in Wellington on June 21?

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Market context

Wellington’s airport is starting the day with a mild-but-windy setup, and the market will settle on the **day’s maximum temperature** recorded at Wellington Intl Airport in Celsius on 21 June. Early observations already show 15°C at the airport, with a south-southwesterly wind of 24 mph and rising pressure, while the BBC forecast for Sunday points to thundery showers, a gentle breeze and a forecast high of 18°C[1].

That backdrop matters because June in Wellington usually sits in the mid-teens Celsius rather than anything especially warm, so the distribution of outcomes is typically compressed around low-to-mid teen highs rather than extreme swings[3][5]. MetService also noted that Wellington had already beaten its maximum June temperature on record in the days leading into this period, with more than 19°C reported, which is a useful reminder that brief warm spikes are possible even in a winter month[4]. Against that frame, a market pricing of 0% for the top end looks anchored to the expectation that the airport will not reach a standout late-afternoon surge.

For traders, the main catalyst is the evolution of the local forecast through the day: whether showers clear, whether sunshine breaks through, and whether the wind slackens enough to allow a higher peak. The most relevant public signals are the airport-specific forecast and live observations, which can shift quickly as the maritime flow changes; BBC Weather already shows a forecast spread from 9°C overnight to 18°C in the daytime, while NOAA’s Wellington airport time series provides the live temperature path used to judge the eventual high[1][2].

Sources: 1 · 2 · 3 · 4 · 5

Methodology

This page tracks Highest temperature in Wellington on June 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. Trump Prediction routes every trade through to Polymarket — at 0% fees.

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

Where can I trade this market with the lowest fees?

On Trump Prediction, which mirrors the Polymarket order book at 0% fees. Kalshi charges up to 7% per trade; Betfair Exchange takes 2-5% commission on net winnings.

Is this market available outside the US?

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How does resolution work?

Through the UMA Optimistic Oracle on Polygon: a proposer submits the outcome, a two-hour challenge window opens, and USDC payouts settle automatically once the result is final.

What does it cost to trade on Trump Prediction?

Zero. Trump Prediction routes every order to the live Polymarket order book; the only cost is the Polygon network fee, typically under $0.01 per transaction.

How reliable are the quoted odds?

The YES/NO percentages are the live mid-prices of the Polymarket order book. On deep markets they move every few seconds; on thinner ones you'll see short plateaus.