Highest temperature in Wellington on July 8?

Platform comparison

Market context

The 0% implied probability for a "YES" outcome on the highest temperature in Wellington reflects a market misalignment with current climatology, where official data places the July average high near 12°C[1]. Historical patterns for early July in Wellington consistently show daytime highs between 11°C and 15°C, making outcomes from 12°C through 16°C statistically probable rather than negligible[9]. Recent Polymarket data for the same date assigns a 47% probability to 12°C and 40% to 13°C, directly contradicting the 0% figure and suggesting the current crowd-implied probability is an outlier against short-term forecast consensus and long-term norms[1].

Traders should monitor real-time updates from Wunderground and NIWA’s May–July 2026 outlook, which assigns roughly equal chances to near-average temperature deviations[1]. Current BBC Weather observations for Wednesday, 8 July, report light rain showers, strong southerly winds at 16 mph, and a temperature feel of 8°C, with pressure rising at 998mb[4]. While AccuWeather’s extended July outlook projects daily highs between 10.5°C and 14°C, the immediate weather pattern of moisture and frontal boundaries may suppress temperatures below the climatological average, requiring close tracking of hourly precipitation and wind shifts before the settlement window closes[2]. Any sudden shift in wind direction or intensity could alter the peak temperature, making these dependencies critical for accurate positioning.

Sources: 1 · 2 · 3 · 4 · 5

Methodology

We track Highest temperature in Wellington on July 8? across the five venues with material prediction-market liquidity. The probability shown is the live Polymarket mid; the comparison rows summarise how each venue treats the underlying contract — fees, KYC thresholds, settlement currency, deposit options. The highlighted row marks the cheapest route into Polymarket's order book.

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?

Polymarket is geo-blocked in the US/UK/EU. The easiest 0%-fee broker into the same order book is Prediction Today. Kalshi charges up to 7% per trade; Betfair Exchange takes 2-5% commission on net winnings.

Is this market available outside the US?

Polymarket itself is geo-blocked in the US/UK/EU. Always check the legal status of prediction markets in your jurisdiction before trading.

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?

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