Highest temperature in Wellington on August 14?

Platform comparison

Market context

Wellington International Airport's daily maximum temperature on 14 August 2026 will be recorded via Weather Underground's Daily Observations table, with settlement in USDC against the specified temperature range. The market currently shows 0% implied probability across all ranges, suggesting either illiquidity or a data-loading lag typical of early-stage weather contracts on decentralised platforms.

August is mid-winter in New Zealand's capital, with historical daily maxima typically ranging from 11–14 °C. The MetService records show Wellington's August averages cluster tightly: the 30-year mean high sits around 12.5 °C, with extremes rarely exceeding 16 °C or falling below 8 °C in recorded observations. A 0% probability across all bins is anomalous for a market settling against a physical measurement; traders should verify contract liquidity and check whether the Wunderground API feed has populated the resolution criteria correctly before committing capital.

Catalysts include any significant weather system crossing the South Island in early-to-mid August 2026—a warm front could push Wellington's maximum several degrees above seasonal norms, whilst a polar outbreak would depress readings. The National Institute of Water and Atmospheric Research (NIWA) publishes monthly climate outlooks; the July 2026 forecast will be material for positioning. Traders should monitor NZD/USD spot rates, as weather-driven energy demand swings occasionally correlate with short-term currency moves, though the direct macro tie-in to BTC or ETH funding rates is negligible for a single-day local temperature event.

Methodology

This page reads Highest temperature in Wellington on August 14? on-chain. Polymarket's quote comes directly from the Polygon order book — the only comparable venue with on-chain settlement. Kalshi (USD, off-chain), Betfair (GBP/EUR, off-chain) and Manifold (play-money) are listed alongside for venue context. Every CTA routes to BTC Prediction, which mirrors the Polymarket order book directly.

Resolution & payout

Settlement is on-chain via UMA Optimistic Oracle. A proposer posts the outcome with a bond, a two-hour dispute window opens, then the smart contract lifts winning conditional tokens to 1 USDC and sends payments to holders' wallets automatically. No withdrawal fees beyond Polygon gas.

Off-chain venues (Kalshi, Betfair, Smarkets) settle in local fiat through bank-side clearing — faster than SWIFT, slower than on-chain. Manifold pays no real cash.

UK Frequently Asked Questions

What are crypto prediction markets?

Crypto prediction markets are on-chain smart contracts where you buy YES or NO shares on a future crypto event (e.g. "BTC above $100k by year-end"). The market price between 0¢ and 100¢ is the implied probability.

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USDC is the Polygon standard — audited reserves (Circle, monthly attestation), deepest order book, low gas costs. ETH volatility would distort probability quotes; USDT has thinner Polygon liquidity than USDC.

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Polymarket is accessible to UK traders but is not UKGC-licensed. It operates under US CFTC jurisdiction. UK residents face no domestic legal prohibition on using it, but UKGC consumer protections do not apply. For UKGC-regulated alternatives, Betfair Exchange and Smarkets offer similar prediction-style markets.

Do I pay tax on prediction market profits in the UK?

UKGC-licensed platform profits (Betfair, Smarkets) are typically tax-free gambling winnings for UK individuals. Polymarket profits involve USDC crypto transactions, which HMRC treats as Capital Gains Tax events. Keep full transaction records and report via Self Assessment if gains exceed £3,000 per tax year.

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