Highest temperature in Wellington on June 25?

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Market context

The real-world event this market tracks is the highest temperature recorded at Wellington International Airport on 25 June 2026, measured in degrees Celsius. In prediction markets, a YES share pays out if the temperature falls within a specific range the market defines, while a NO share pays out if it falls outside that range. Here, the crowd currently implies a 0% chance of the YES outcome, suggesting traders believe the temperature will not match the specific range in question.

Historically, June in Wellington is cool and overcast, with average daily highs dropping from 57°F to 54°F (roughly 14°C to 12°C) and frequent cloud cover [3]. While MetService recently noted Wellington beat its record June maximum with over 19°C recorded earlier in the month [5], such extremes are rare anomalies against the typical 12–14°C baseline seen in comparable years [2]. The current 0% probability likely reflects this statistical norm, where temperatures rarely spike high enough to trigger the YES condition unless an unusual heatwave occurs.

Traders should monitor MetService NZ weather forecasts and any sudden shifts in wind patterns, as strong south-south-westerly winds and rain are typical for late June [2]. A key catalyst is the official Wunderground daily record for NZWN, which will settle the market at 12:00 UTC on 25 June [1]. If forecasters announce a break in the cloud cover or a shift to north-easterly winds, temperatures could rise above the usual range, potentially altering the implied probability before the settlement window closes.

Sources: 1 · 2 · 3 · 4 · 5

Methodology

Methodologically we separate two layers: the live probability (Polymarket mid-price) and the platform attributes (fee, KYC, settlement currency, payment rails). The odds column is filled only where we have clean data — that avoids the made-up numbers that get a network demoted when search engines cross-check against the source venue.

Resolution & payout

Settlement runs on-chain. Polymarket's contract logic separates YES and NO shares as conditional tokens; at resolution the winning share lifts to $1.00 and the losing one to $0. The outcome input comes from the UMA Optimistic Oracle, which secures against bad resolution with a bond + dispute window.

Once finalised, the smart contract pays USDC to the holders' wallets within minutes — no withdrawal fees beyond Polygon network gas. Kalshi settles in USD via CFTC clearance, Betfair in account currency net of commission, Manifold in play-money mana with no cash-out.

FAQ

Where can I trade this market with the lowest fees?

On Prediction Market UK, 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.

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 Prediction Market UK?

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

Do I need to KYC for this market?

Not under $1,500 of lifetime trading volume. Above that threshold, Prediction Market UK 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.