Highest temperature in Wellington on June 26?

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Market context

The real-world event hinges on the highest temperature recorded at Wellington International Airport on 26 June 2026, a date deep in New Zealand’s winter where gales and heavy rain typically suppress heat. Current crowd-implied probability sits at 0% for a specific high, reflecting the market’s view that extreme warmth is virtually impossible under prevailing winter conditions. Historical data confirms this: June averages see daily highs drop from 57°F to 54°F (14°C to 12°C), with overcast skies covering 42% of the month[4]. Even recent anomalies, such as Wellington beating its record June maximum with over 19°C, occurred under unusual warmth, not typical winter weather[5]. A power-user approaching this programmatically would script a bot to pull Wunderground’s hourly data, cross-referencing it with MetService’s wind and pressure alerts to flag deviations from the norm[5].

Traders must monitor immediate catalysts: MetService’s live wind-speed updates (currently 24 mph south-south-westerly) and pressure trends (996mb, rising), which directly influence cloud cover and temperature suppression[2]. The settlement window ends at 12:00 UTC on 26 June, so any sudden shift in wind direction or pressure could alter the outcome. Recent news from MetService highlights Wellington’s record-breaking June warmth, but this is an outlier, not a trend[5]. A conditional order strategy would trigger if Wunderground’s hourly data shows a spike above 15°C, though current forecasts predict highs between 51°F and 55°F (11°C to 13°C)[8]. Dependencies include the gear icon’s temperature setting on Wunderground, ensuring Celsius data is used for resolution[1]. No moralising is needed; the facts dictate that winter conditions make extreme heat improbable, and the 0% probability aligns with historical patterns[4].

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

At resolution the UMA oracle takes over: a proposer posts the outcome with a bond, any token holder can dispute within two hours. Without dispute the result is accepted and the smart contract distributes USDC instantly.

On Kalshi (CFTC-regulated) resolution runs through their in-house clearing engine in USD. Betfair Exchange settles after match end in the account's local currency. Manifold pays no cash — only its in-platform "mana" currency.

FAQ

Where can I trade this market with the lowest fees?

On Polymarket App 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'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.

Do I need to KYC for this market?

Not under $1,500 of lifetime trading volume. Above that threshold, Polymarket App 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.