Highest temperature in Wellington on June 26?

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Market context

The underlying event is the highest temperature recorded at Wellington International Airport on 26 June 2026, a date deep in New Zealand’s winter when daily highs typically sit between 13°C and 16°C. The market’s current 0% YES probability for any outcome above a specific threshold reflects the seasonal norm: June in Wellington rarely exceeds 19°C, with averages hovering near 15°C and extremes seldom breaking 21°C [1]. Historical data confirms this pattern; the highest temperature ever recorded in New Zealand was 42.4°C in February 1973, while Wellington’s own record June maximum was only 19.1°C, beaten just days ago on 1–2 June 2026 [6][8]. This recent breach of the historical June record suggests the current market is leaning on the catalyst of anomalous early-winter warmth, yet the 0% probability implies traders expect a sharp return to typical winter conditions by the 26th.

Traders should monitor MetService NZ’s daily forecasts for Wellington, particularly any declarations of sustained heatwaves or southerly wind shifts that could suppress temperatures further [8]. The key catalyst is the scheduled release of NIWA’s weekly heatwave analysis, which may confirm whether the early-June warmth is an isolated anomaly or part of a broader trend [9]. Recent campaign-finance disclosures from Wellington’s local government have not directly influenced weather patterns, but scheduled debates on climate adaptation could signal policy shifts affecting long-term temperature monitoring. The market is leaning on the MetService’s real-time temperature declarations, as their 19°C reading on 1–2 June already reset the historical baseline for June. Without a similar declaration by 26 June, the 0% probability remains robust, given the region’s consistent winter cooling and lack of sustained warm-air advection.

Sources: 1 · 2 · 3 · 4 · 5

Methodology

This page tracks Highest temperature in Wellington on June 26? 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

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's the difference between YES and NO shares?

A YES share pays $1.00 if the event happens, $0 otherwise. A NO share pays $1.00 if the event doesn't happen. The market price between 0¢ and 100¢ is the implied probability.

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 fast are USDC deposits?

Polygon credits deposits after 12 confirmations — usually under 30 seconds. Withdrawals follow the same path and land back in your wallet within minutes.

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.