Highest temperature in Wellington on June 25?

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Market context

The real-world event centres on the highest temperature recorded at Wellington International Airport on 25 June 2026, measured in degrees Celsius and sourced from Wunderground. A power-user evaluating this market programmatically would first ingest historical daily highs for late June to establish a baseline, noting that June temperatures at this station typically decrease by 3°F across the month, rarely falling below 50°F or exceeding 62°F[2]. The current crowd-implied probability of 0% for any specific outcome suggests the market expects the temperature to fall outside the defined range, yet historical data shows afternoon highs clustering between 12°C and 16°C in mid-June, with the average high for June sitting at 54°F[4][7]. This discrepancy between the 0% probability and the consistent historical clustering of 12–16°C afternoon highs indicates a potential mispricing that a conditional order strategy could exploit.

Traders should monitor the MetService NZ announcements for any record-breaking warm spells, as Wellington recently exceeded its maximum June temperature on record with over 19°C recorded earlier in the month[3]. The primary catalyst is the daily weather schedule dependency, specifically the forecast for 25 June which projects daily highs ranging from 51° to 60°F with overnight lows between 43° and 50°F[7]. A bot executing a copy-trading strategy would watch for sudden shifts in the MetService forecast updates, as these directly influence the probability of the temperature landing within the target range. The settlement window ending at 12:00 UTC on 25 June 2026 means that any late-morning temperature spike could resolve the market, making real-time Wunderground data ingestion essential for accurate positioning.

Sources: 1 · 2 · 3 · 4 · 5

Methodology

This page reviews Highest temperature in Wellington on June 25? across five venues. We show live odds for Polymarket-based markets (sourced from the Polygon order book); for other venues we list platform attributes, since the comparable contracts are not exposed via a public API on every venue. Every CTA points at Polymarket Review UK — the application we operate, where you trade directly against the Polymarket order book at 0% fees.

Resolution & payout

Polymarket-based markets settle through the UMA Optimistic Oracle on Polygon. A proposer submits the outcome, a two-hour challenge window opens, and unchallenged proposals finalise the resolution. Payouts settle automatically in USDC the moment the result is final — no bookmaker, no delay.

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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.

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