Highest temperature in Wellington on August 14?

Platform comparison

Market context

Wellington International Airport will record a maximum temperature on 14 August 2026, measured against the Daily Observations table on Weather Underground rather than summary figures. The settlement window closes at midday UTC on that date, meaning the highest reading captured during the full calendar day in Wellington (NZST, UTC+12) must be established before the market resolves. Polymarket currently prices this contract at 0% YES across all temperature bands, reflecting either extreme confidence in cooler conditions or minimal liquidity and trader interest in this particular weather outcome.

August is Wellington's winter month, with historical daily maxima typically ranging from 11–13°C at the airport station. The 0% probability across all ranges suggests traders are pricing in either an unusually cold pattern or treating the market as illiquid. Comparable August days at Wellington Airport show that temperatures above 15°C are rare but not unprecedented; the airport's August records span several decades, providing sufficient baseline data for assessing whether any given range represents genuine outlier territory or standard seasonal variation.

The New Zealand MetService issues 10-day forecasts that become more reliable five to seven days before the target date. Traders should monitor mid-August 2026 forecasts for any anomalous warming systems or high-pressure ridges that could push temperatures above seasonal norms. Southern Hemisphere winter patterns, including the frequency of polar outbreaks versus subtropical air incursions, will determine whether the current zero-probability pricing holds or whether conditional token values shift materially as the settlement window approaches.

Methodology

We track Highest temperature in Wellington on August 14? 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

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.

UK Frequently Asked Questions

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 PolyGram. 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.

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%.