Highest temperature in Wellington on August 12?

Platform comparison

Market context

Wellington International Airport's daily maximum temperature on 12 August 2026 will be recorded via Weather Underground's Daily Observations table, with settlement in USDC against the precise instrumental reading rather than rounded summary figures. The market currently shows 0% implied probability across all temperature bands, suggesting either incomplete price discovery or expectation that the settlement window closure on 12 August at 12:00 UTC will occur before final temperature data is confirmed and validated by the weather service.

August represents Wellington's winter month, with historical daily maxima typically ranging between 11–14 °C at the airport station. The 0% crowd probability across all ranges is unusual given that some temperature outcome is certain; this may reflect thin liquidity, late-stage market formation, or traders awaiting closer proximity to the settlement date when meteorological forecasts narrow. Comparable winter-month temperature markets on crypto platforms have shown clustering around seasonal normals, with outlier ranges (both unusually warm and cold) trading at minimal odds until weather systems move into forecast range.

Traders should monitor the MetService New Zealand forecast updates in the week preceding 12 August, particularly any warnings of cold fronts or warm air masses affecting the lower North Island. The exact timing of the settlement window—noon UTC on the event date—creates a hard deadline for data availability; Weather Underground's Daily Observations table typically updates once per calendar day, meaning traders will need confirmation that the final reading has been published and locked before USDC settlement executes. Any delays in data publication or discrepancies between observation sources could trigger resolution disputes.

Methodology

This page reads Highest temperature in Wellington on August 12? 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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Polygon gas is typically under $0.01 per transaction. A full trade cycle (Approve + Order + Fill) totals around $0.03 — compared to $5-50 on Ethereum mainnet.

Is Polymarket legal in the UK?

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.

How do I deposit on Polymarket from the UK?

UK traders typically fund Polymarket via Coinbase UK, Kraken or Revolut — buying USDC with GBP and transferring to a Polygon-compatible wallet (MetaMask, Coinbase Wallet). Polymarket's onboarding walks you through the bridging process. Typical GBP-to-USDC conversion costs 0.5–1%.