Highest temperature in Wellington on June 25?

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Market context

The underlying event is the highest temperature recorded at Wellington International Airport on 25 June 2026, a date deep in New Zealand’s winter when daily highs typically range between 13°C and 16°C. Current crowd-implied probability sits at 0% YES for any unusually high outcome, reflecting consensus that extreme warmth is virtually impossible this far into the cold season. Historical data confirms June highs in Wellington rarely exceed 16°C (61°F), with averages dropping from 13.5°C to 12.5°C as the month progresses[1]. Even during recent heatwaves, such as when Kelburn hit 30.3°C, such extremes occurred in summer, not mid-winter[5]. The 0% pricing aligns with underdog status for any high-temperature scenario; value, if it exists, would lie only in contrarian bets on rare southerly anomalies, though meteorological records show no precedent for such events in June[4].

Traders should monitor MetService NZ’s daily forecasts for the first week of June 2026, particularly any announcements of record-breaking June temperatures earlier in the month, which could signal unusual atmospheric patterns[7]. While Wellington already beat its maximum June temperature on 1–2 June with over 19°C recorded, this early spike does not guarantee sustained warmth by 25 June, as winter cooling trends remain dominant[7]. Dependencies include solar irradiance levels, which remain essentially constant at 1.8 kWh throughout June, limiting potential for sudden thermal surges[1]. No scheduled weather announcements or climate models currently suggest a deviation from typical winter norms, reinforcing the underdog position of high-temperature outcomes. The consensus remains firmly on the cold side, with value spots unlikely unless unexpected data emerges from NIWA’s heatwave monitoring or MetService’s real-time updates[5][7].

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 Who Will Win 2026 — 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.

Kalshi-based markets settle in USD via the CFTC-regulated clearinghouse. Betfair Exchange settles in GBP/EUR net of commission. Manifold is play-money and does not pay out real funds.

FAQ

Where can I trade this market with the lowest fees?

On Who Will Win 2026, 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.

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.

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.

Do I need to KYC for this market?

Not under $1,500 of lifetime trading volume. Above that threshold, Who Will Win 2026 triggers a quick verification flow that finishes in 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.