Highest temperature in Wellington on June 26?

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Market context

Wellington is currently experiencing gales and heavy rain, with temperatures hovering around 15°C and strong south-south-westerly winds, making a 0% crowd-implied probability for a high-temperature spike on June 26 entirely logical given the immediate weather conditions[2]. Historical data for Wellington in June shows average daily highs dropping from 57°F to 54°F, with the month typically overcast or mostly cloudy for 42% of the time, further reinforcing the market's bearish stance on extreme warmth[4]. Even recent record-breaking claims of over 19°C in Wellington occurred under different atmospheric contexts, and current forecasts for late June 2026 predict highs strictly between 51°F and 55°F, leaving little room for the temperature ranges required to trigger a "YES" settlement[6][8].

Traders monitoring this Polymarket contract, which settles on USDC via Polygon using conditional tokens, should focus on the MetService daily updates and the specific wind speed dependencies that currently cap thermal accumulation[2]. The primary catalyst to watch is the persistence of the heavy rain and gales forecasted for Saturday 27th, which suggests the atmospheric pressure system will remain stable and suppress any potential heat surge on the settlement date[2]. With the settlement window ending at 12:00 UTC on 26 June 2026, the on-chain mechanics will resolve based on Wunderground data, but the physical reality of the 24-mile-per-hour winds and 72% humidity makes a deviation from the current 0% probability statistically improbable without a sudden, unforecasted shift in the regional weather pattern[2].

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 Kalshi 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.

Is this market available outside the US?

Kalshi UK is available in most jurisdictions where Polymarket isn't directly accessible. Polymarket itself is geo-blocked in the US/UK/EU. Always check local regulations.

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 Kalshi UK?

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