Highest temperature in Wellington on July 28?

Platform comparison

Market context

Wellington's maximum temperature on 28 July 2026 will be recorded at the international airport station and resolved against historical Weather Underground data. The settlement window closes at midday UTC, capturing the full calendar day's peak in New Zealand Standard Time. Current market pricing at 0% suggests traders see little conviction in any single temperature band, typical for weather markets more than eighteen months out where historical patterns hold greater weight than near-term forecasting.

July is Wellington's coldest month, with mean maximum temperatures around 11–12°C and extremes rarely exceeding 17°C at the airport site. The 0% probability across all ranges reflects the market's nascent state rather than meteorological impossibility; winter days occasionally reach 16–18°C during föhn wind events or anticyclonic systems, though sub-10°C maxima are equally plausible. Historical records show Wellington's July temperatures cluster tightly, making wide temperature bands necessary to capture meaningful resolution categories.

Traders monitoring this market should track New Zealand MetService seasonal outlooks as 2026 approaches, particularly any signals of anomalous winter patterns or La Niña/El Niño phase shifts that could influence southern hemisphere winter severity. The airport's exposure to Cook Strait wind patterns means föhn events—warm, dry northwesterlies—remain the primary catalyst for atypical July warmth. Real-time probability shifts will likely emerge only in late June or early July when deterministic forecasts become actionable, making current pricing a placeholder pending seasonal clarity.

Methodology

This page reviews Highest temperature in Wellington on July 28? across five venues. The live probability is the Polymarket mid-price, sourced directly from the on-chain Polygon order book; the comparison columns benchmark each venue on fee structure, KYC, settlement currency and payment rails. Every CTA routes to Prediction Today, which mirrors 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?

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.

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