Highest temperature in Wellington on July 7?

Platform comparison

Market context

The real-world event hinges on the highest temperature recorded at Wellington International Airport on 7 July 2026, measured in degrees Celsius and resolved via Wunderground data. With the current crowd-implied probability for a "YES" outcome sitting at 0%, the market effectively treats any deviation from the expected range as negligible, yet historical patterns suggest a more nuanced picture. In early July, Wellington typically experiences daytime highs between 11°C and 15°C, with the climatological average near 12–13°C. Polymarket data for the same date shows 13°C as the frontrunner at 51%, followed by 14°C at 43%, indicating that while extreme heat is unlikely, temperatures within this narrow band are highly probable. NIWA’s seasonal outlook for May–July 2026 reinforces this, noting air temperatures are most likely near average (45% chance) or below average (35%), with occasional cold snaps possible under persistent high pressure [3].

For a power-user approaching this programmatically, the key catalysts are not single announcements but evolving dependencies in the seasonal forecast and real-time atmospheric conditions. Traders should monitor NIWA’s updated circulation anomalies and high-pressure systems, which directly influence fog, frost, and nighttime lows that could suppress daytime peaks. Recent extended July outlooks from AccuWeather project daily highs between 10.5–14°C, clustering around long-term averages, which aligns with the current market pricing [9]. A conditional order strategy would weight 13°C and 14°C as primary outcomes, using Wunderground’s live history feed to validate deviations as the settlement window closes. The medium forecast confidence for temperatures and the lack of persistent warm circulation anomalies mean that sudden spikes are improbable, but traders must remain alert to rapid shifts in pressure systems that could alter the daily maximum [3].

Sources: 1 · 2 · 3 · 4 · 5

Methodology

This page is a comparison snapshot: one live quote, four reference venues with their key attributes, and a single execution path — every trade button routes to Kalshi Fees, which mirrors the Polymarket order book directly.

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?

Polymarket is geo-blocked in the US/UK/EU. The easiest 0%-fee broker into the same order book is Kalshi 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.

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?

On Polymarket directly, no — it's wallet-based. Intermediary brokers like Kalshi Fees trigger KYC only above $1,500 of lifetime trading volume; under that you trade pseudonymously with a single wallet address.