Highest temperature in Wellington on July 1?

Platform comparison

Market context

Wellington, New Zealand, faces its coldest month in July, where average highs rarely exceed 53°F (11.7°C), making a significant heat spike on 1 July 2026 statistically improbable. Historical records confirm this trend, with the city’s all-time maximum of 30.3°C occurring only on a rare heatwave day in recent years, not during typical midwinter conditions[1]. The current crowd-implied probability of 0% YES aligns precisely with these decades of data, as July 1 has never registered temperatures in the upper ranges required to trigger a positive resolution for this market.

Traders evaluating this market programmatically should monitor real-time Wunderground feeds for the Wellington Intl Airport Station, checking for any anomalous southerly gusts or unseasonal warming events that might contradict the baseline[3]. While no specific weather announcements are scheduled for this date, the dependency on clear sky conditions and lack of cloud cover remains critical, as any deviation would be immediately visible in the hourly data stream. Recent climate analysis from NIWA reinforces that such extremes are exceptionally rare in midwinter, further validating the 0% probability[1]. For a bot-driven approach, conditional orders should be set to ignore this market unless Wunderground reports a sudden, unexplained temperature spike exceeding 20°C before settlement.

Sources: 1 · 2 · 3 · 4 · 5

Methodology

We track Highest temperature in Wellington on July 1? 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 Polymarket Bot UK. 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.

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 Polymarket Bot UK trigger KYC only above $1,500 of lifetime trading volume; under that you trade pseudonymously with a single wallet address.