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, with current market sentiment assigning zero probability to any outcome above the lowest threshold. Historical data for Wellington in June shows average daily highs between 12°C and 14°C, with overcast conditions prevailing 42% of the time and solar energy remaining steady at 1.8 kWh [1][6]. Notably, MetService NZ recently confirmed Wellington surpassed its record June maximum with over 19°C recorded earlier this month, suggesting that while extreme heat is rare, it is not impossible [5]. This recent record-breaking warmth frames the current 0% probability as potentially overly conservative, given that June temperatures can occasionally spike beyond typical averages.

Traders should monitor MetService NZ announcements and the National Weather Service time-series for Wellington Intl Airport, particularly any shifts in wind patterns or pressure systems that could drive temperature anomalies [3][4]. A key dependency is the resolution source from Wunderground, which will publish the day’s maximum temperature at 12:00 UTC on 25 June 2026; any delay or discrepancy in this data could affect settlement timing. Recent forecasts from AccuWeather for June 2026 in similar regions show daily highs ranging from 21°C to 36°C, though these are for a different location and should not be directly applied to Wellington [8]. The catalyst to watch is whether Wellington experiences another record-breaking day like the one earlier in June, which could significantly alter the probability distribution.

Regulatory accessibility for this market hinges on German GlüStV implications and US CFTC reach, with the “no-KYC up to $1,500” rule allowing traders to participate without identity verification for stakes below this threshold. This provision enhances accessibility for UK-based traders using platforms like Polymarket, provided they comply with local tax and KYC obligations. While GlüStV may impose stricter licensing for German operators, the CFTC’s reach extends to US-based platforms, creating a dual-regulatory landscape that affects market structure. The no-KYC threshold ensures that small-scale traders can access this weather prediction market without bureaucratic hurdles, though larger stakes will require full compliance with regulatory standards.

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 KYC UK — the application we operate, where you trade directly against the Polymarket order book at 0% fees.

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 KYC 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?

Polymarket KYC 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.

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 KYC 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.