Highest temperature in Wellington on August 11?

Platform comparison

Market context

Polymarket is pricing this Wellington temperature contract at **0% YES** right now, which means the market is treating a qualifying high in the required Weather Underground range as effectively impossible. Settlement is tied to the **Daily Observations** table for Wellington Intl Airport Station, so the practical question for a trader is whether the day’s maximum temperature in Celsius lands inside whichever bucket the contract specifies, not what the summary panel shows. The market is funded and traded in **USDC on Polygon**, with the outcome represented through conditional tokens, so the position lives or dies on the final observed weather print rather than any subjective forecast.

That 0% screen fits Wellington’s usual August profile. Long-run climate normals put August mean maximum temperatures around **12.9°C** in Wellington, and Weather Underground’s own daily history page shows a recent high of **59°F / 15°C** with a 0 in precipitation, while Time and Date’s historic page for 11 August shows midday temperatures in the mid-teens Fahrenheit equivalents and a high earlier in the month of **61°F**. In other words, the city is cool but not frozen, and the contract only needs the airport station to print within the target band once the Daily Observations table updates. Comparable August weather references also cluster around the low teens Celsius, which helps explain why the market can look dormant even when a modest warm spell would matter.

The main catalysts are the local weather run-up and the timing of the airport observations themselves. Traders will watch any short-term forecast change for a post-frontal warm-up, cloud cover, or southerly change affecting Wellington Airport, because even small shifts can move the maximum temperature across a narrow settlement band. The key dependency is not an official announcement but the live station feed used by Weather Underground’s history pages; once the temperature peak is logged there, the conditional token outcome should follow that record if the Daily Observations table and summary disagree.

Sources: 1 · 2 · 3 · 4 · 5

Methodology

We track Highest temperature in Wellington on August 11? 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

Polymarket-based markets settle through the UMA Optimistic Oracle on Polygon. A proposer submits the outcome, a two-hour challenge window opens, and unchallenged proposals finalise the resolution. Payouts settle automatically in USDC the moment the result is final — no bookmaker, no delay.

Kalshi-based markets settle in USD via the CFTC-regulated clearinghouse. Betfair Exchange settles in GBP/EUR net of commission. Manifold is play-money and does not pay out real funds.

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 Polymarket Scam?. 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%.