Highest temperature in Wellington on August 17?

Platform comparison

Market context

On 17 August 2026, Wellington International Airport will record a daily maximum temperature. This market asks traders to predict which temperature range—expressed in degrees Celsius—will contain that highest reading. In prediction markets, a YES share pays out if the event occurs; a NO share pays out if it doesn't. Here, you're selecting a specific temperature band rather than a binary outcome. The crowd currently assigns zero probability to any single range resolving YES, suggesting either extreme uncertainty across all bands or a technical display issue. Resolution will use Weather Underground's Daily Observations table from Wellington Intl Airport Station, prioritising that source over summary figures if any discrepancy emerges.

Wellington's August weather sits firmly in the Southern Hemisphere winter, with historical daily maxima typically ranging between 11–14 °C. The 0% crowd probability across all ranges is unusual given that some temperature outcome is certain to occur. This may reflect thin liquidity, late-stage market conditions, or traders awaiting clearer seasonal forecasts before committing capital. August 2026 falls outside current meteorological data windows, so near-term weather models won't yet provide reliable guidance.

Traders should monitor MetService (New Zealand's national forecaster) releases as August 2026 approaches, particularly any seasonal outlooks issued in mid-2026. Southern Hemisphere winter patterns—including the strength of the Amundsen Sea Low and subtropical ridge positioning—typically drive Wellington's temperature variability during this month. Any unusual atmospheric circulation anomalies flagged in official forecasts would shift probability distributions meaningfully.

Methodology

This page reviews Highest temperature in Wellington on August 17? 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 Market UK, 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.

UK Frequently Asked Questions

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.

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.

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%.